WO2015013985A1

WO2015013985A1 - Communication method, device and system for multiple access points

Info

Publication number: WO2015013985A1
Application number: PCT/CN2013/080751
Authority: WO
Inventors: 杨讯; 罗毅; 李靖
Original assignee: 华为技术有限公司
Priority date: 2013-08-02
Filing date: 2013-08-02
Publication date: 2015-02-05
Also published as: US20160149671A1; US10868639B2; US10122498B2; US20190052408A1; CN105393483B; CN109167620B; CN105393483A; CN109167620A

Abstract

The present invention relates to the field of communications, and can support error recovery when multiple transmitters and multiple receivers transmit data together, thereby ensuring the reliability of data transmission, and increasing the throughput of the system. Provided are a communication method, device and system for multiple access points. The method comprises: a primary transmitter and a secondary transmitter send data corresponding to each receiver together to the receivers by means of a shared channel; the primary transmitter sends a BAR corresponding to the data to the receivers; the primary transmitter receives BA corresponding to the BAR sent by the receiver s; if the BA indicates that data is correctly received by the receivers, the data cached by the primary transmitter is cleared, and if the BA indicates that the data is not correctly received by the receivers, the data that is not correctly received is retransmitted, and the data that is correctly received and cached by the primary transmitter is cleared.

Description

Communication method, device and system for multiple access points

The present invention relates to the field of communications, and in particular, to a communication method, apparatus, and system for multiple access points.

Background technique

In a wireless communication system, multi-input and multi-output (MIMO) refers to the use of multiple antennas to construct multi-dimensional spatial resources, and these multi-dimensional spatial resources form multiple parallel paths. Thus, the wireless stations in the system can use these parallel paths to transmit multiple signals to increase the data transmission rate. Generally, a method of dividing a wireless station that configures a larger number of antennas into a plurality of wireless stations that configure a smaller number of antennas by using spatial resources to distinguish users and transmit data is called downlink multiuser MIMO (DL MU- MIMO), a method in which a plurality of wireless stations configured with fewer antennas use a spatial resource to distinguish users and transmit data to a wireless station configured with a larger number of antennas is called uplink multi-user multiple input multiple output (Uplink Multiuser MIMO, UL MU). -MIMO).

In the prior art, in a wireless communication system that acquires a channel based on a contention method, in order to ensure the reliability of data transmission, in DL MU-MIMO, since there are multiple receiving ends, after the transmitting end transmits data, it needs to The data is received by each receiving end one by one according to a certain time sequence. After receiving the inquiry, each receiving end receives the information correctly received, and the receiving end returns the information correctly received by the data to the transmitting end. In UL MU-MIMO, after multiple senders simultaneously send data to the receiver, if the data is received correctly, the receiver returns the information correctly received by each sender in a certain time sequence, or the receiver only returns one. The information received correctly by the data, but in this information, it is necessary to separately indicate to each receiving end.

However, the above two scenarios only support one sender and multiple receivers of DL MU-MIMO, and error recovery when multiple transmitters and one receiver of UL MU-MIMO transmit data (not correctly received at the receiver) Data initiated retransmission), does not support multiple The error recovery when the transmitting end and the plurality of receiving ends simultaneously transmit data, therefore, the system for simultaneously transmitting data by multiple transmitting ends and multiple receiving ends cannot guarantee the reliability of data transmission.

Summary of the invention

Embodiments of the present invention provide a communication method, apparatus, and system for multiple access points, which can support error recovery when multiple transmitting ends and multiple receiving ends jointly transmit data, thereby ensuring reliability of data transmission and improving system reliability. Throughput.

In order to achieve the above object, an embodiment of the present invention uses the following technical solution: In a first aspect, an embodiment of the present invention provides a communication system, including a primary transmitting end, and at least one secondary transmitting end of the shared channel of the primary transmitting end, And at least one receiving end, wherein

The primary sender is used to:

Transmitting, respectively, data corresponding to each receiving end to the respective receiving ends; respectively sending a block confirmation request BAR corresponding to the data to each of the receiving ends;

Receiving, by the respective receiving ends, a block acknowledgement BA corresponding to the BAR; if the BA indicates that the data is correctly received by the respective receiving ends, clearing the data buffered by the primary transmitting end, if The BA indicates that the data is not correctly received by the respective receiving ends, and then retransmits the data that is not correctly received, and clears the data that is correctly received by the primary transmitting end buffer;

The secondary sender is used to:

Transmitting the data to the respective receiving ends simultaneously with the primary transmitting end by using the shared channel;

The receiving end is used to:

Receiving the data sent by the primary transmitting end and the secondary sending end;

Receiving, by the primary transmitting end, the BAR corresponding to the data;

Sending the BA corresponding to the BAR to the primary transmitting end.

In a first possible implementation of the first aspect,

The secondary sender is also used to: Obtaining, by the respective receiving end, the BA sent by using the shared channel; if the BA indicates that the data is correctly received by each receiving end, clearing the data buffered by the secondary transmitting end, or If the BA indicates that the data is not correctly received by the respective receiving ends, retransmitting the data that is not correctly received by the primary transmitting end by using the shared channel, and clearing the secondary The data buffered by the sender is correctly received.

In conjunction with the first aspect of the foregoing or the first possible implementation of the first aspect, in a second possible implementation,

After the primary transmitting end sends the BAR corresponding to the data to the respective receiving ends, and is further configured to: if the BA corresponding to the BAR is not received after a preset time, resend the The BAR does not return to the receiving end of the BA.

In combination with the first aspect of the foregoing or the first possible implementation of the first aspect, in a third possible implementation manner,

After receiving the BA sent by each receiving end, the primary transmitting end is further configured to: if the BA indicates that the data is not correctly received by the receiving ends, send a data indication to the incorrect receiving station. The respective receiving ends of the data, the data indication is used to indicate the data that is not correctly received by the respective receiving ends.

With reference to the foregoing first aspect, or any one of the first possible implementation manner of the first aspect to the third possible implementation manner, in the fourth possible implementation manner, the receiving end is two More than

The primary transmitting end is specifically configured to separately send the BAR to each receiving end according to a preset sequence, where the preset sequence is first and the primary transmitting end belongs to the same basic service group BS S The receiving end sends, and sends the same to the respective receiving ends that do not belong to the same BS S.

In combination with the foregoing first aspect or any one of the first possible implementation to the fourth possible implementation of the first aspect, in a fifth possible implementation,

The primary transmitting end is specifically configured to:

Obtaining a first indication according to the BA, where the first indication is used to indicate the primary sending Receiving the data correctly received by the respective receiving ends;

And clearing, according to the first indication, the data that is buffered by the primary transmitting end and corresponding to the first indication.

In conjunction with the fifth possible implementation of the first aspect, in a sixth possible implementation,

The primary transmitting end is further configured to send the first indication to the secondary sending end. With reference to the fifth possible implementation manner of the first aspect or the sixth possible implementation manner, in a seventh possible implementation manner,

And the secondary sending end is further configured to receive the first indication sent by the primary sending end before the secondary sending end clears the correctly received data buffered by the secondary sending end according to the BA.

In conjunction with the seventh possible implementation of the first aspect, in an eighth possible implementation,

The secondary transmitting end is specifically configured to:

Obtaining, according to the BA, a second indication, where the second indication is used to indicate that the data received by the each receiving end that is received by the secondary transmitting end is correctly received;

And combining the data indicated by the first indication and the data indicated by the second indication;

And clearing, according to the result of the union, the data corresponding to the result buffered by the secondary transmitting end.

In a second aspect, the embodiment of the present invention provides a communication system, including a primary transmitting end, and at least one secondary transmitting end of the shared channel of the primary transmitting end, and at least one first receiving end associated with the primary transmitting end, And at least one second receiving end associated with the secondary transmitting end, wherein

The primary sender is used to:

Sending first data corresponding to each first receiving end to each of the first receiving ends;

Transmitting, respectively, a first block confirmation request BAR corresponding to the first data to each of the first receiving ends;

Receiving, by each of the first receiving ends, a first corresponding to the first BAR A piece of confirmation BA;

And if the first BA indicates that the first data is correctly received by each of the first receiving ends, clearing the first data buffered by the primary sending end, or if the first BA indicates the first The data is not correctly received by the first receiving ends, and the first data that is not correctly received is separately retransmitted and the first data that is correctly received by the primary transmitting end is cleared, where The first BAR and the first BA carry a preset sequence indication, where the sequence indication is used to instruct the secondary sending end to send a second BAR corresponding to the second data, where the second BAR is in the second BAR Carrying the sequence indication;

The secondary sender is used to:

Transmitting, by the shared channel, the second data corresponding to each second receiving end to the respective second receiving ends in synchronization with the primary transmitting end;

Obtaining, by the first first receiving end, the first BA sent by using the shared channel, and acquiring the sequence indication according to the first BA;

And sequentially transmitting the second BAR to each of the second receiving ends according to the sequence indication;

Receiving, by the second receiving end, the second BA corresponding to the second BAR, where the second BA carries the sequence indication;

And if the second BA indicates that the second data is correctly received by each of the second receiving ends, clearing the second data buffered by the secondary transmitting end, or if the second BA indicates the second The data is not correctly received by the second receiving ends, and the second data that is not correctly received is separately retransmitted and the second data that is correctly received by the secondary transmitting end buffer is cleared;

The first receiving end is used to:

Receiving the first data and the first BAR sent by the primary transmitting end;

Sending the first BA corresponding to the first BAR to the primary sending end; the second receiving end is configured to:

Receiving the second data and the second BAR sent by the secondary transmitting end;

Transmitting the second BA corresponding to the second BAR to the secondary transmitting end. In a first possible implementation of the second aspect,

After the first sending end sends the first BAR corresponding to the first data to the first receiving end, the main sending end is further configured to: after the preset time, does not receive the first BAR corresponding to the first BAR The first BA, then resending the first BAR to the first receiving end that does not return to the first BA.

In conjunction with the second aspect of the foregoing or the first possible implementation of the second aspect, in a second possible implementation,

After receiving the first BA sent by each of the first receiving ends, the primary transmitting end is further configured to: if the first BA indicates that the first data is not correctly received by the first receiving ends Transmitting, by the first data indication, the respective first receiving ends that do not correctly receive the first data, where the first data indication is used to indicate the first that is not correctly received by the respective first receiving ends data.

In combination with the foregoing second aspect or any one of the first possible implementation to the second possible implementation of the second aspect, in a third possible implementation,

After the second sending end sends the second BAR corresponding to the second data to the respective second receiving ends, the second sending end is further configured to: after the preset time, fail to receive the second The second BA corresponding to the BAR resends the second BAR to the second receiving end that does not return to the second BA.

In conjunction with the foregoing second aspect or any one of the first possible implementation to the third possible implementation of the second aspect, in a fourth possible implementation,

After receiving the second BA sent by each of the second receiving ends, the secondary transmitting end is further configured to: if the second BA indicates that the second data is not correctly received by the second receiving ends Sending a second data indication to the respective second receiving ends that do not correctly receive the second data, the second data indication indicating the second second that is not correctly received by the respective second receiving ends data.

In combination with the foregoing second aspect or any one of the first possible implementation to the fourth possible implementation of the second aspect, in a fifth possible implementation Wherein, the secondary transmitting end is two or more, and the sequence indication is sent first with the secondary transmitting end of the same basic service group BSS, and the primary transmitting end does not belong to the same BS S. And sending, by the sending end, the sequence indication includes an identifier of the primary sending end and an identifier of the secondary sending end, where the identifier of the primary sending end includes a media access control MAC address or an associated serial number AID of the primary sending end, where The identifiers of the secondary senders include the MAC address or AID of each secondary sender.

With reference to the foregoing second aspect, or any one of the first possible implementation manner to the fifth possible implementation manner, in the sixth possible implementation manner, the first receiving end For more than two, the second receiving end is two or more, and the sequence indication further includes an identifier of each of the first receiving ends, and is used to indicate that each of the first receiving ends sends the first BA in sequence And the sequence indication further includes an identifier of each of the second receiving ends, where the identifiers of the second receiving ends are respectively sent by the respective second receiving ends, where the identifiers of the respective first receiving ends respectively include A MAC address or an AID of each of the first receiving ends, where the identifiers of the respective second receiving ends respectively include a MAC address or an AID of each of the second receiving ends.

In a third aspect, an embodiment of the present invention provides a transmitting apparatus, which is applied to a wireless communication system that acquires a channel based on a contention method, where the communication system includes at least one of the primary transmitting end and the primary transmitting end sharing channel. And a device, and at least one receiving end, wherein the sending device comprises:

a sending unit, configured to send data to the receiving end simultaneously with the primary transmitting end by using the shared channel, and when the data is not correctly received by each receiving end, pass the shared channel and the primary sending end Simultaneously retransmitting the data that was not correctly received;

a storage unit, configured to cache the data;

An obtaining unit, configured to obtain a block confirmation BA sent by each receiving end by using the shared channel;

a clearing unit, configured to: if the BA indicates that the data is correctly received by each of the receiving ends, clear the data cached by the storage unit, or if the BA indicates that the data is not received by the respective If the terminal receives correctly, the storage unit is cleared. The stored data is received correctly.

In a first possible implementation manner of the third aspect, the sending device further includes a receiving unit;

The receiving unit is configured to receive, by the clearing unit, the first indication sent by the primary sending end, before the clearing unit clears the correctly received data of the storage unit buffer, where the first indication is used to indicate the The data received by the respective receiving ends correctly received by the primary transmitting end.

In combination with the first possible implementation of the third aspect, in a second possible implementation manner,

The acquiring unit is further configured to acquire a second indication according to the BA, where the second indication is used to indicate the data that the receiving end acquired by the sending device correctly receives the data;

The clearing unit is specifically configured to determine a union of the data indicated by the first indication and the data indicated by the second indication, and clear the storage unit cache according to a result of obtaining a union The data corresponding to the result.

According to a fourth aspect, the embodiment of the present invention further provides a transmitting apparatus, where the method is applied to a wireless communication system that acquires a channel based on a contention method, where the communication system includes at least one of a primary transmitting end and a shared channel of the primary transmitting end. a transmitting device, at least one first receiving end associated with the primary transmitting end, and at least one second receiving end associated with the transmitting device, wherein the transmitting device comprises:

a sending unit, configured to send, by using the shared channel, the second data corresponding to each second receiving end to the second receiving end in synchronization with the primary transmitting end;

An acquiring unit, configured to acquire a first block confirmation BA sent by each first receiving end by using the shared channel, and obtain a preset sequence indication according to the first BA, where the first BA carries the sequence indication The sequence indicates an order for instructing the sending device to send a second block acknowledgment request BAR corresponding to the second data sent by the sending unit, where the second BAR carries the sequence indication;

The sending unit is further configured to separately send the second BAR to each of the second receiving ends according to the sequence indication acquired by the acquiring unit, and in each of the second When the receiving end does not correctly receive the second data, retransmitting the second data that is not correctly received, respectively;

a storage unit, configured to cache the second data;

a receiving unit, configured to receive, after the sending unit separately sends the second BAR, a second BA that is sent by each of the second receiving ends, where the second BA carries the sequence indication;

a clearing unit, configured to: if the second BA received by the receiving unit indicates that the second data is correctly received by each of the second receiving ends, clear the second data cached by the storage unit, or if And the second BA indicates that the second data is not correctly received by the second receiving ends, and the second data that is correctly received by the storage unit cache is cleared.

In a first possible implementation of the fourth aspect,

The sending unit is further configured to: after the sending unit separately sends the second BAR corresponding to the second data to each of the second receiving ends, after the preset time, the receiving If the unit does not receive the second BA corresponding to the second BAR, the second BAR is retransmitted to a second receiving end that does not return to the second BA.

In a second possible implementation of the fourth aspect,

The sending unit is further configured to: after the receiving unit receives the second BA sent by each of the second receiving ends, if the second BA indicates that the second data is not the first And the second receiving end sends the second data indication to the second receiving end that does not correctly receive the second data, where the second data indication is used to indicate that the second receiving end is not correctly received. The second data.

In a fifth aspect, an embodiment of the present invention provides a communication method for multiple access points, which is applied to a wireless communication system that acquires a channel based on a contention method, where the communication system includes a primary transmitting end, and a shared channel of the primary transmitting end. At least one secondary transmitting end, and at least one receiving end, wherein

The secondary transmitting end simultaneously sends data to the receiving end through the shared channel and the primary transmitting end;

Obtaining, by the secondary transmitting end, the respective receiving ends are respectively sent by using the shared channel Block confirmation BA;

If the BA indicates that the data is correctly received by each of the receiving ends, the secondary transmitting end clears the data buffered by the secondary transmitting end;

Or,

If the BA indicates that the data is not correctly received by the respective receiving ends, the secondary transmitting end simultaneously retransmits the data that is not correctly received by using the shared channel and the primary transmitting end, and The secondary transmitting end clears the data that is correctly received by the secondary transmitting end buffer.

In a first possible implementation manner of the fifth aspect, before the secondary sending end clears the data cached by the secondary sending end, the method further includes:

The secondary transmitting end receives the first indication sent by the primary transmitting end, where the first indication is used to indicate the data that the respective receiving ends acquired by the primary transmitting end correctly receive.

With reference to the first possible implementation manner of the fifth aspect, in a second possible implementation manner, the sending, by the secondary sending end, the data that is cached by the secondary sending end, Obtaining, by the BA, a second indication, where the second indication is used to indicate the data that is received by the receiving end that is correctly received by the sending device;

And the secondary transmitting end obtains a union of the data indicated by the first indication and the data indicated by the second indication;

And the secondary transmitting end clears the data corresponding to the result cached by the secondary transmitting end according to the result of obtaining the union.

In a sixth aspect, the embodiment of the present invention further provides a communication method for multiple access points, which is applied to a wireless communication system that acquires a channel based on a contention method, where the communication system includes a primary transmitting end, and a shared channel of the primary transmitting end. At least one secondary transmitting end, at least one first receiving end associated with the primary transmitting end, and at least one second receiving end associated with the secondary transmitting end, where

Transmitting, by the secondary transmitting end, the second data corresponding to each second receiving end to the respective second receiving ends by using the shared channel and the primary transmitting end;

Obtaining, by the secondary transmitting end, each of the first receiving ends is respectively sent by using the shared channel The first block confirms the BA, and obtains a preset sequence indication according to the first BA, where the first BA carries the sequence indication, and the sequence indication is used to indicate that the secondary sender sends the first The second block corresponding to the second data confirms the order of the requesting BAR, and the second BAR carries the sequence indication;

The secondary transmitting end sequentially sends the second BAR to the respective second receiving ends according to the sequence indication;

Receiving, by the second sending end, the second BA corresponding to the second BAR that is sent by each of the second receiving ends, where the second BA carries the sequence indication;

If the second BA indicates that the second data is correctly received by each of the second receiving ends, the secondary transmitting end clears the second data buffered by the secondary transmitting end; or

If the second BA indicates that the second data is not correctly received by the second receiving ends, the secondary transmitting end initiates retransmission of the second data that is not correctly received and clears the secondary sending. The second data of the side buffer is correctly received.

In a first possible implementation manner of the sixth aspect, after the second sending end sends the second BAR to the second receiving end, the method further includes: if after a preset time, Receiving the second BA corresponding to the second BAR, the secondary transmitting end resending the second BAR to a second receiving end that does not return to the second BA.

In a second possible implementation manner of the sixth aspect, after the second sending end receives the second BA that is sent by each of the second receiving ends, the method further includes:

If the second BA indicates that the second data is not correctly received by the respective second receiving ends, the secondary transmitting end sends a second data indication to the respective seconds that do not correctly receive the second data. The receiving end, the second data indication is used to indicate the second data that is not correctly received by the respective second receiving ends.

The embodiment of the present invention provides a communication method, device, and system for multiple access points. After the primary transmitting end and the secondary transmitting end respectively send data corresponding to each receiving end to each receiving end through the shared channel, the primary transmitting end Send the BAR corresponding to the data separately And receiving, by each receiving end, a BA corresponding to the BAR sent by each receiving end, and if the BA indicates that the data is correctly received by each receiving end, clearing the data buffered by the primary transmitting end, if the BA indicates the data If not received by each receiving end correctly, retransmission is performed on the data that is not correctly received, and the data that is correctly received by the primary transmitting end is cleared. According to the solution, when the data is transmitted between the multiple transmitting ends and the multiple receiving ends, the primary transmitting end can learn the data received by each receiving end according to the BA returned by each receiving end, and can The correctly received data initiates retransmission and clears the correctly received data buffered by the primary transmitting end, thereby performing error recovery on the data received by each receiving end, thereby ensuring the reliability of data transmission and improving the throughput of the system.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is some embodiments of the invention.

FIG. 1 is a flowchart of a method for communicating multiple access points according to an embodiment of the present invention. FIG. 2 is a flowchart of another method for communicating multiple access points according to an embodiment of the present invention. FIG. FIG. 4 is a schematic diagram of error recovery during cooperative transmission according to an embodiment of the present invention; FIG. 5 is a flowchart of a method for communicating multiple access points according to an embodiment of the present invention; FIG. 7 is a schematic structural diagram of a BA according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a BAR according to an embodiment of the present disclosure; FIG. 10 is a schematic diagram of error recovery during coordinated beamforming/interference alignment according to an embodiment of the present invention; FIG.

11 is a schematic structural diagram 1 of a transmitting apparatus according to an embodiment of the present invention; FIG. 12 is a schematic structural diagram 2 of a transmitting apparatus according to an embodiment of the present invention; FIG. 13 is a schematic structural diagram 3 of a transmitting apparatus according to an embodiment of the present invention; FIG. 15 is a schematic structural diagram of a beamformer according to an embodiment of the present invention; FIG. 16 is a block diagram of a communication system according to an embodiment of the present invention;

FIG. 17 is a second block diagram of a communication system according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments.

The various techniques described herein can be used in a variety of wireless communication systems, such as current 2G, 3G communication systems and next generation communication systems, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), Code Division Multiple Access) system, Time Division Multiple Access (TDMA), Wideband Code Division Multiple Access (WCDMA) system, Frequency Division Multiple Access (FDMA) System, Orthogonal Frequency-Division Multi-Access (OFDMA) system, Single-Carrier Frequency Division Multiple Access (SC-FDMA) system, General Packet Radio Service (GPRS, General Packet Radio Service system, Long Term Evolution (LTE) system, and other such communication systems.

Embodiment 1

An embodiment of the present invention provides a communication method for multiple access points, as shown in FIG. 1 , which is applied to a wireless communication system for acquiring a channel based on a contention method, where the communication system includes at least a primary transmitting end and a shared channel of the primary transmitting end. One secondary sender, and at least one connection Receiving, the method involves a secondary sender, and the method may include:

S101. The secondary transmitting end simultaneously sends data to each receiving end through the shared channel and the primary transmitting end.

In the multi-user MIM0 system, as the overall throughput demand of the network increases sharply, the network interference problem has become a key factor hindering the further improvement of network capacity. Eliminating the interference problem of the network from the perspective of multiple senders, and even increasing the overall throughput of the network by using the interference problem of the network has become a development trend, such as cooperative transmission, coordinated beamf orming / interference alignment ( Interference alignment ) and other methods.

The cooperative transmission is to share data and channel information in multiple users in the multi-user MIM0 system to form a MIM0 transmitting end with more antennas, and the M IM0 transmitting end with more antennas can be sent to one receiving end or simultaneously Send data to multiple receivers.

The method for communication of multiple access points provided by the embodiment of the present invention is applied to a fault recovery process when a plurality of transmitting ends use a cooperative transmission method to transmit data in a wireless communication system that acquires a channel based on a competitive method, where Error recovery can be defined as the sender re-transmitting data that is not correctly received by the receiver. In the data transmission, if the receiving end does not correctly receive the data sent by the transmitting end, the error recovery can ensure that the receiving end correctly receives the data sent by the transmitting end.

In a wireless communication system in which a plurality of transmitting ends transmit data by means of cooperative transmission, first, a primary transmitting end is required to be preset among a plurality of transmitting ends (the remaining transmitting ends can serve as a secondary transmitting end), and the primary transmitting end is responsible for Obtaining the receiving status of data sent by each receiving end to each receiving end, so that when the data is not correctly received by each receiving end, the primary transmitting end or the primary transmitting end and the corresponding secondary transmitting end may be retransmitted not correctly received. The data is transmitted to the respective receiving ends of the data that are not correctly received, thereby ensuring the reliability of data transmission.

Illustratively, the wireless communication system provided by the embodiment of the present invention includes a primary transmitting end, and at least one secondary transmitting end and at least one receiving end of the primary transmitting end shared channel. The primary transmitting end and the at least one secondary transmitting end share data to be sent to each receiving end. And the channel information to be used to send data. When the wireless communication system communicates, at least one secondary transmitting end and the primary transmitting end simultaneously send data corresponding to each receiving end to be transmitted to each receiving end.

If there is only one receiving end, the above data is single user data; if there are two or more receiving ends, the above data is multi-user data, and the multi-user data includes mutually independent for multiple receiving ends, ie The data corresponding to each receiving end is buffered by each transmitting end in a shared manner, and is separately transmitted to each receiving end by spatial multiplexing.

In the embodiment of the present invention, the secondary transmitting end simultaneously sends data to the receiving end through the shared channel and the primary transmitting end, where the data is sent to each receiving end at the same time as the primary transmitting end and the secondary transmitting end, and respectively corresponding to each receiving end. Corresponding data, that is, data that is simultaneously transmitted by the primary transmitting end and the secondary transmitting end to each receiving end is mutually independent data for each receiving end.

S102. The secondary transmitting end acquires a block acknowledgement (ΒΑ) sent by each receiving end through the shared channel.

After the primary transmitting end and the secondary transmitting end send the data corresponding to each receiving end to each receiving end, the primary transmitting end sends a Block Acknowledgement Request (BAR) corresponding to the data to each receiving end.

It should be noted that the BAR is a request message for confirming the reception of data transmitted by the respective receiving ends to the primary transmitting end and the secondary transmitting end. The BAR corresponds to the data sent to each receiving end, that is, if there is only one receiving end, there is only one BAR; if there are multiple receiving ends, the BAR has separate indication information for each receiving end, and the specific expression may be Each receiver has a BAR for requesting the receiver to send the corresponding BA.

Further, each receiving end may generate a BA according to the receiving condition of the data sent by the primary transmitting end and the secondary transmitting end, that is, the BA may be used to indicate the receiving status of the data by each receiving end, that is, the receiving success or the receiving failure, thereby making the main The transmitting end and the secondary transmitting end can learn the transmission result of the data according to the BA returned by each receiving end, that is, the data transmission succeeds or the transmission fails. A person skilled in the art can understand that in the method of cooperative transmission, after multiple senders compete to obtain the right to use the channel, multiple senders use the same channel, that is, the shared channel transmits data to each receiver. That is, the primary transmitting end and the secondary transmitting end can simultaneously send data corresponding to each receiving end to each receiving end. Correspondingly, the primary transmitting end and the secondary transmitting end can also simultaneously receive the BAs sent by the respective receiving ends through the shared channel. That is to say, when each receiving end sends the BA to the primary transmitting end, since the primary transmitting end and the secondary transmitting end share the channel, the secondary transmitting end can also acquire the BA.

5 1 0 3. If the B A indicates that the data is correctly received by each receiving end, the secondary transmitting end clears the data buffered by the secondary transmitting end.

After the secondary transmitting end obtains the B A sent by each receiving end through the shared channel, the secondary transmitting end can learn according to the B A that each receiving end receives the data, that is, the receiving succeeds or the receiving fails. If the BA indicates that the data is correctly received by each receiving end, the secondary transmitting end may clear the data buffered by the secondary transmitting end.

5 1 04. If the BA indicates that the data is not correctly received by each receiving end, the secondary transmitting end initiates retransmission of the data that is not correctly received by the primary transmitting end through the shared channel, and the secondary transmitting end clears the secondary transmitting end buffer. The data that was received correctly.

If the BA indicates that the data is not correctly received by each receiving end, the secondary transmitting end simultaneously retransmits the data that is not correctly received by each receiving end through the shared channel and the primary transmitting end, and the secondary transmitting end clears the secondary transmitting end buffer. Data that is correctly received by each receiver.

The foregoing data is not correctly received by each receiving end, and the method includes: the receiving end does not correctly receive the data sent by the primary sending end and the secondary sending end; or, the receiving end correctly receives the sending by the primary sending end and the secondary sending end. The data is received, and the part of the receiving end does not correctly receive the data sent by the primary transmitting end and the secondary transmitting end. In particular, the fact that a receiving end does not correctly receive data may include: the receiving end does not correctly receive all data, and the receiving end does not correctly receive part of the data.

In particular, the secondary transmitting end and the primary transmitting end initiate retransmission of data that is not correctly received by each receiving end, that is, error recovery of data to ensure reliability of data transmission.

It should be noted that, since the channels are shared between multiple transmitting ends and multiple receiving ends, the BA, the secondary transmitting end, and the primary transmitting end can be simultaneously used for each receiving end. Received the BA.

A multi-access point communication method provided by an embodiment of the present invention can support error recovery when multiple transmitting ends and multiple receiving ends simultaneously transmit data, thereby ensuring reliability of data transmission and improving throughput of the system. the amount.

The embodiment of the present invention provides a communication method for multiple access points, where the secondary transmitting end and the primary transmitting end respectively send data corresponding to each receiving end to each receiving end through a shared channel, and the secondary transmitting end acquires each receiving end separately. The BA sent through the shared channel, and if the BA indicates that the data is correctly received by each receiving end, clearing the data buffered by the primary transmitting end, if the BA indicates that the data is not correctly received by each receiving end, the pair is not correctly The received data initiates a retransmission and clears the correctly received data buffered by the primary sender. According to the solution, when the data is transmitted between the multiple transmitting ends and the multiple receiving ends, the secondary transmitting end can learn the data received by each receiving end according to the BA returned by each receiving end, and can The correctly received data initiates retransmission and clears the correctly received data buffered by the secondary transmitting end, thereby performing error recovery on the data received by each receiving end, thereby ensuring the reliability of data transmission and improving the throughput of the system.

An embodiment of the present invention provides another communication method for multiple access points. As shown in FIG. 2, the present invention is applied to a wireless communication system for acquiring a channel based on a contention method, where the communication system includes a primary transmitting end and a shared transmitting channel of the primary transmitting end. At least one secondary transmitting end, at least one first receiving end associated with the primary transmitting end, and at least one second receiving end associated with the secondary transmitting end, the method involving the secondary transmitting end, the method may include:

S2 01: The secondary transmitting end sends the second data corresponding to each second receiving end to each second receiving end synchronously with the primary transmitting end through the shared channel.

In the multi-user M I M0 system, as the overall throughput demand of the network increases sharply, the network interference problem has become a key factor hindering the further improvement of network capacity. Eliminating the interference problem of the network from the perspective of multiple senders, and even increasing the overall throughput of the network by using the interference problem of the network has become a development trend, such as cooperative transmission, coordinated beam shaping/interference alignment.

The above coordinated beamforming is shared by multiple senders in a multi-user MI M0 system. After part or all of the channel information, a reasonable transmission scheme is calculated according to the characteristics of each of the multiple transmitting ends, so that the multiple transmitting ends simultaneously transmit data to multiple receiving ends, and mutual interference or mutual interference can be to some extent ignore. The interference alignment is that after the data is transmitted simultaneously by the multiple transmitting ends, the signals arriving at the respective receiving ends are in orthogonal dimensions, so that the respective receiving ends effectively separate the useful signals.

Another multi-access point communication method provided by an embodiment of the present invention is applied to a wireless communication system based on a contention acquisition channel, and multiple transmission terminals use a coordinated beamforming/interference alignment method to recover data during error recovery. Process.

In a wireless communication system in which a plurality of transmitting ends transmit data by using a coordinated beamforming/interference alignment method, first, a primary transmitting end is preset in a plurality of transmitting ends, and then a plurality of transmitting ends are started from the primary transmitting end. The receiving status of the data sent by each receiving end is obtained in turn, so that when the receiving end does not correctly receive the data, the corresponding transmitting end can retransmit the data that is not correctly received to the corresponding receiving end, thereby ensuring reliable data transmission. Sex.

In the method for coordinating beamforming/interference alignment used in the embodiment of the present invention, after the secondary transmitting end shares part or all of the channel information with the primary transmitting end, the primary transmitting end respectively sends the first data corresponding to each first receiving end to Simultaneously with the first receiving end associated with the primary transmitting end, the secondary transmitting end also sends the second data corresponding to each second receiving end to each second receiving end associated with the secondary transmitting end, that is, the secondary transmitting end passes The shared channel transmits the second data corresponding to each second receiving end to each of the second receiving ends in synchronization with the primary transmitting end.

It should be noted that "associated" is the result of association of an associated process of the prior art. Specifically, the receiving end sends an association request to the sending end, and if the sending end agrees to associate with it, that is, agreeing to provide a service for it, it means that the receiving end is associated with the sending end.

Further, there are many reasons why the receiving end can be successfully associated with the sending. For example, if the receiving end that the sending end can provide the service has reached the upper limit, the sending end of the associated request sent by the receiving end will not be permitted, that is, the receiving end does not have any Associated with the sender.

If there is only one receiving end, the above data is single user data; if there are two Or more than two receiving ends, the data is multi-user data, the multi-user data includes mutually independent data for multiple receiving ends, and each transmitting end buffers the multi-user data by a shared manner, and independently Simultaneously transmitted to each receiving end by spatial multiplexing.

S2 02, the secondary transmitting end acquires the first BA sent by each first receiving end through the shared channel, and obtains a preset sequence indication according to the first BA, where the first BA carries the sequence indication, and the sequence indication is used for indicating The secondary transmitting end sends the sequence of the second BAR corresponding to the second data, and the second BAR carries the sequence indication.

After the second sending end sends the second data to the second receiving end, the second sending end first acquires the first BA sent by each first receiving end through the shared channel, where the first BA carries a preset sequence indication, the sequence The indication may be used to instruct the secondary transmitting end to send the second BAR corresponding to the second data, that is, each secondary transmitting end in the secondary transmitting end may sequentially send the second BAR to each second receiving end according to the sequence indication, and the second BAR The sequence indication is also carried in the middle.

It should be noted that each receiving end may generate a corresponding BA according to the receiving condition of the data sent by the primary transmitting end and the secondary transmitting end, that is, the BA may be used to indicate the data receiving sent by the receiving end to the primary transmitting end and the secondary transmitting end. Success or reception failure.

A person skilled in the art can understand that in the method of coordinating beamforming/interference alignment, after multiple senders compete for the right to use the channel, multiple senders use the same channel to send data to the receiver. The first sending end and the main transmitting end can synchronously transmit the first data and the second data for each receiving end associated with the respective receiving end, and correspondingly, because the secondary transmitting end shares the channel with the main transmitting end, Therefore, when the first receiving end sends the first BA to the primary transmitting end, the secondary transmitting end can also acquire the first BA.

S 2 03. The secondary transmitting end respectively sends the second BAR to each of the second receiving ends according to the sequence indication.

After the secondary transmitting end obtains the first BA, the secondary transmitting end may separately send the second BAR to each second receiving end according to the sequence indication carried in the first BA, that is, the secondary transmitting end sequentially sends the second receiving end according to the sequence indication. The second data corresponds to the second BAR to each Second receiving end.

S 2 04. The secondary transmitting end receives the second BA corresponding to the second BAR sent by each second receiving end, and the second BA carries the sequence indication.

After the secondary transmitting end sends the second BAR, the secondary transmitting end may receive the second BA corresponding to the second BAR sent by each second receiving end, where the second BA carries the sequence indication, which is due to other times of sending. The terminal may continue to complete the transmission of the BAR in sequence according to the sequence indication carried in the second BA.

It should be noted that, in another communication method for multiple access points provided by the embodiment of the present invention, first, the primary transmitting end respectively sends the first BAR corresponding to the first data to each first receiving end to request each of the first After receiving the first data by the receiving end, after each first receiving end returns the first BA, each secondary transmitting end sequentially sends the second BAR corresponding to the second data to the first BA according to the sequence indication in the first BA. Each of the associated second receiving ends requests the second receiving end to receive the second data until all the transmitting ends (the primary transmitting end and the secondary transmitting end) request at least one time to participate in the current data transmission. Receiving end.

S 2 05. If the second BA indicates that the second data is correctly received by each second receiving end, the secondary transmitting end clears the second data buffered by the secondary transmitting end.

After the secondary transmitting end receives the second BA respectively sent by each second receiving end, the secondary transmitting end can learn, according to the second BA, the receiving status of the second data by each second receiving end, that is, each second receiving end pairs the second data. Received successfully or received failed. If the second BA indicates that the second data is correctly received by each of the second receiving ends, the secondary transmitting end may clear the second data buffered by the secondary transmitting end.

S2 06. If the second BA indicates that the second data is not correctly received by each second receiving end, the secondary transmitting end initiates retransmission of the second data that is not correctly received and clears the correctly received data buffered by the secondary transmitting end. .

If the second BA indicates that the second data is not correctly received by each second receiving end, the secondary transmitting end may initiate retransmission of the second data that is not correctly received, and clear the correctly received second data buffered by the secondary transmitting end. So as to ensure the reliability of the second data transmission.

The foregoing second data is not correctly received by each second receiving end, and may include: Each of the second receiving ends does not correctly receive the second data sent by the secondary transmitting end; or, some of the second receiving ends correctly receive the second data sent by the secondary transmitting end, and some of the second receiving ends do not correctly receive the secondary transmitting end and send the second data. The second data.

In particular, the secondary transmitting end initiates retransmission of the second data that is not correctly received by the respective second receiving ends, that is, error recovery of the second data to ensure the reliability of the second data transmission.

It should be noted that since the channels are shared between multiple transmitting ends and between multiple receiving ends, the BAs can be simultaneously received by the secondary transmitting end and the primary transmitting end from the respective receiving ends.

It should be noted that, when each second receiving end sends the second BA through the shared channel, the primary transmitting end may also receive the second BA, but the sequence indication carried in the second BA and the second BA is only used to indicate other The secondary transmitting end of the sending of the BAR performs the corresponding steps. Therefore, the process of receiving the second BA by the primary transmitting end is not detailed in the embodiment of the present invention.

Another multi-access point communication method provided by the embodiment of the present invention can support the error recovery when multiple transmitting ends and multiple receiving ends simultaneously transmit data, thereby ensuring the reliability of data transmission and improving the system. Throughput.

The embodiment of the present invention provides another communication method for multiple access points. After the secondary transmitting end and the primary transmitting end synchronously send the second data corresponding to each second receiving end to each second receiving end, the secondary transmitting end acquires each The first receiving end respectively sends the first BA sent by the shared channel, and the secondary sending end sends the second BAR corresponding to the second data to each second receiving end according to the sequence indication carried in the first BA, and receives the second from each second Transmitting, by the receiving end, the second BA corresponding to the second BAR, and if the second BA indicates that the second data is correctly received by each second receiving end, clearing the second data buffered by the secondary transmitting end, if the second BA indicates If the two data are not correctly received by the second receiving end, the second data that is not correctly received is retransmitted, and the second data that is correctly received by the secondary transmitting end is cleared. According to the solution, when the data is transmitted between the multiple transmitting ends and the multiple receiving ends, the secondary transmitting end can learn the data received by each receiving end according to the BA returned by each receiving end, and can The correctly received data initiates retransmission, and clears the correctly received data buffered by the secondary transmitting end, thereby Receive failed data for error recovery, thereby ensuring the reliability of data transmission and improving system throughput.

Embodiment 2

An embodiment of the present invention provides a communication method for multiple access points. As shown in FIG. 3, the present invention is applied to a wireless communication system for acquiring a channel based on a contention method, where the communication system includes at least a primary transmitting end and a shared channel of the primary transmitting end. a secondary transmitting end, and at least one receiving end, the method may include:

S 301, the primary transmitting end and the secondary transmitting end simultaneously send data corresponding to each receiving end to each receiving end.

The cooperative transmission is to share data and channel information by multiple senders in the multi-user MI M0 system to form a MI M0 transmitter with more antennas, and the MI M0 sender with more antennas can be sent to one receiver. Or send data to multiple receivers at the same time.

The method for communication of multiple access points provided by the embodiment of the present invention is applied to a fault recovery process when multiple senders use a cooperative transmission method to transmit data in a wireless communication system based on a contention acquisition channel, wherein an error occurs. Recovery can be defined as the sender re-transmitting data that is not correctly received by the receiver. In the data transmission, if the receiving end does not correctly receive the data sent by the transmitting end, the error recovery can ensure that the receiving end correctly receives the data sent by the transmitting end.

In a wireless communication system in which a plurality of transmitting ends transmit data by means of cooperative transmission, first, a primary transmitting end is required to be preset among a plurality of transmitting ends (the remaining transmitting ends can serve as a secondary transmitting end), and the primary transmitting end is responsible for Obtaining the receiving status of data sent by each receiving end to each receiving end, so that when the data is not correctly received by each receiving end, the primary transmitting end or the primary transmitting end and the corresponding secondary transmitting end may not be correctly retransmitted. The received data is sent to each receiving end that does not correctly receive the data, thereby ensuring the reliability of data transmission.

Illustratively, the wireless communication system provided by the embodiment of the present invention includes a primary transmitting end, and at least one secondary transmitting end and at least one receiving end of the primary transmitting end shared channel. The primary transmitting end and the at least one secondary transmitting end share data to be transmitted to each receiving end and channel information to be used for transmitting data. When the wireless communication system communicates, the primary transmitting end and the at least one secondary transmitting end simultaneously send data corresponding to each receiving end to be transmitted to each receiving end.

In the embodiment of the present invention, the primary transmitting end and the secondary transmitting end simultaneously send data to each receiving end through a shared channel, where the data is sent to each receiving end at the same time as the primary transmitting end and the secondary transmitting end, and is respectively connected to each receiving end. Corresponding data, that is, data that is simultaneously transmitted by the primary transmitting end and the secondary transmitting end to each receiving end is mutually independent data for each receiving end.

S302. Each receiving end generates a corresponding first according to the receiving condition of the data.

M.

After each receiving end receives the data sent by the primary transmitting end and the secondary transmitting end, each receiving end can generate a corresponding BA according to the receiving condition of the data.

It should be noted that the BA can be used to indicate the receiving status of the data by each receiving end, that is, the receiving success or the receiving failure, so that the primary transmitting end and the secondary transmitting end can learn according to the BA that each receiving end sends the primary sending end and the secondary sending end. Data received successfully or received failed.

S 303. The primary transmitting end sends a BAR corresponding to the data to each receiving end.

After the primary transmitting end and the secondary transmitting end simultaneously send data corresponding to each receiving end to each receiving end through the shared channel, the primary transmitting end may send a BAR corresponding to the data. To each receiving end, where the BAR can be used to request the receiving status of the data sent by the primary transmitting end and the secondary transmitting end by each receiving end.

Optionally, the primary sending end may send the BAR to each receiving end according to a preset sequence, where the preset sequence may be sent to each receiving end of the first basic service set (BSS) of the primary sending end and the primary transmitting end. , and then sent to each receiving end of the primary transmitting end that does not belong to the same BSS.

Optionally, the order in which the primary transmitting end sends the BAR may be determined by the primary transmitting end. A feasible method is that the primary transmitting end pre-sets the order of sending the BAR before sending the data, and after the data is sent, according to the pre- It is assumed that the BAR is sent to each receiving end of the data in sequence. That is, the primary transmitting end may sequentially send the BAR to each receiving end according to the foregoing preset sequence; the primary transmitting end may also determine the order of sending the next BAR after transmitting the previous BAR, which is not limited by the present invention.

It should be noted that the BAR can be used to request the receiving status of the data sent by the receiving end to the primary transmitting end and the secondary sending end, that is, the receiving end receives the success or the receiving fails.

Specifically, the primary transmitting end may send the data to each receiving end at the primary transmitting end and the secondary transmitting end, and then send the BAR to each receiving end, that is, the primary transmitting end sends the BAR in an explicit manner; or may be in the primary transmitting end. The secondary transmitting end simultaneously transmits the data to each receiving end and carries the BAR, that is, the primary transmitting end sends the BAR in an implicit manner, which is not limited by the present invention.

Further, the preset sequence provided by the embodiment of the present invention may be a receiving end in the original BSS, and a receiving end outside the BSS; or a receiving end outside the BSS, a receiving end in the BSS, and the like. The present invention is not limited in any order that satisfies the communication requirements. Specifically, in the case of multiple first receiving ends, the order in which the primary transmitting end sends the first BAR to the multiple first receiving ends may be that the primary transmitting end first sends the first BAR to the first receiving end that belongs to the same BSS as the primary transmitting end. And sending the first BAR to the first receiving end that does not belong to the same BSS as the primary transmitting end; or sending the first BAR to the first receiving end that does not belong to the same BSS as the primary transmitting end, and then sending the first The BAR is the first receiving end that belongs to the same BSS as the primary transmitting end.

It can be understood that the communication method of multiple access points provided by the embodiments of the present invention The primary transmitting end may sequentially send the first BAR to all the receiving ends (including the receiving end associated with the primary transmitting end and the receiving end associated with the secondary transmitting end); whereas in the prior art, the primary transmitting end can only send The first BAR is to a receiving end associated with the primary transmitting end.

The present invention does not limit the execution sequence of S 302 and S 303. That is, the present invention may execute S 303 after executing S 302 first; or S 302 may be executed after S 303 is executed first; S 302 and S 303 may also be executed at the same time.

S304. Each receiving end sends a BA corresponding to the BAR to the primary transmitting end.

After the BAs are respectively generated by the respective receiving ends, if the BA of the BA is requested by the autonomous transmitting end, each receiving end sends a BA corresponding to the BAR to the main transmitting end.

It should be noted that after the primary transmitting end sends the BAR, the BA corresponding to the BAR may be started after the first preset time. The first preset time may be a Short Inter-frame Space (SIFS). The S I FS provided by the embodiment of the present invention can be defined as the receiving end receiving time + receiving/transmitting switching time + symbol sending time.

Further, the first preset time provided by the embodiment of the present invention starts after the BAR is sent from the sending end. That is, the first preset time in the embodiment of the present invention starts after the BAR is sent from the primary transmitting end.

A person skilled in the art can understand that in the method of cooperative transmission, after multiple senders compete to obtain the right to use the channel, since the primary sender and the secondary sender share the channel, multiple senders use the same channel to separately send. The data corresponding to each receiving end is sent to each receiving end, that is, the primary transmitting end and the secondary transmitting end can simultaneously send data for each receiving end to each receiving end, and correspondingly, the primary transmitting end and the secondary transmitting end can also receive each receiving at the same time. The BA sent by the side.

As shown in FIG. 4, for the error recovery diagram when multiple senders are cooperatively transmitted, multiple senders share the data that needs to be sent to each receiver, and send the data to the corresponding receivers simultaneously, and then the master sender. The BAR corresponding to the data for each receiving end is sequentially sent to the corresponding receiving end, so that each receiving end returns a BA to the primary transmitting end corresponding to the BAR indicating its reception status of the data.

S 305. If the BA indicates that the data is correctly received by each receiving end, the primary sending end and the secondary sending end respectively clear the data buffered by the primary sending end and the secondary sending end. After the primary transmitting end and the secondary transmitting end acquire the BA sent by each receiving end, the primary transmitting end and the secondary transmitting end can learn the receiving status of the data by each receiving end according to the BA, that is, each receiving end successfully receives or receives the data. failure. If the BA indicates that the data is correctly received by each receiving end, the primary transmitting end and the secondary transmitting end respectively clear the cached data.

S 306. If the BA indication data is not correctly received by each receiving end, the primary transmitting end and the secondary transmitting end simultaneously retransmit the data that are not correctly received through the shared channel, and clear the correctly received data of the respective cache. .

If the BA indication data is not correctly received by each receiving end, the primary transmitting end and the secondary transmitting end may simultaneously retransmit the data that is not correctly received through the shared channel, or may be separately received by the primary transmitting end. The data initiates a retransmission. The secondary sender only retransmits the corresponding data when the primary sender needs to participate in the retransmission.

Optionally, after the primary transmitting end receives the BA sent by each receiving end, if the BA indicates that the data is not correctly received by each receiving end, the primary transmitting end may send a data indication to each receiving end that does not correctly receive the data. The data indication can be used to indicate data that is not correctly received by each receiving end.

The foregoing data is not correctly received by each receiving end, and the method includes: the receiving end does not correctly receive the data sent by the primary sending end and the secondary sending end; or, the receiving end correctly receives the sending by the primary sending end and the secondary sending end. The data is received, and the part of the receiving end does not correctly receive the data sent by the primary transmitting end and the secondary transmitting end. In particular, the fact that the data is not correctly received by a receiving end may include: the receiving end does not correctly receive all the data corresponding thereto, or the receiving end does not correctly receive the partial data corresponding thereto.

When each receiving end does not correctly receive data or only correctly receives part of the data, the primary transmitting end may separately send data that is not correctly received by each receiving end to each receiving end, or the primary transmitting end and the secondary transmitting end share a common shared channel. At the same time, the data that is not correctly received by each receiving end is sent to each receiving end to perform error recovery on the data received by the receiving end, that is, retransmission is initiated. In the case that the secondary transmitting end initiates retransmission of the data that is not correctly received, when the primary transmitting end needs the secondary transmitting end to participate in the retransmission, the secondary transmitting end initiates retransmission of the corresponding data. It should be noted that, since the primary transmitting end and the secondary transmitting end are cooperatively transmitting manners, after the primary transmitting end and the secondary transmitting end acquire the BAs respectively sent by the respective receiving ends, the primary transmitting end and the secondary transmitting end further There is a certain information interaction, as shown in FIG. 5, which may specifically include:

(1) The primary transmitting end acquires the first indication that the receiving end correctly receives the data according to the BA; and the secondary transmitting end acquires the second indication that the receiving end correctly receives the data according to the BA.

(2) The primary transmitting end clears the data corresponding to the first indication cached by the primary transmitting end according to the first indication, and the primary transmitting end sends the first indication to the secondary transmitting end.

(3) after receiving the first indication, the secondary transmitting end obtains the data indicated by the first indication and the data indicated by the second indication, and clears the result of the secondary transmitting end buffer and the result according to the result of obtaining the union. Corresponding data.

Optionally, (4) the secondary transmitting end compares the data indicated by the first indication with the data indicated by the second indication, and if the data indicated by the second indication is more than the data indicated by the first indication, the secondary transmitting end indicates that the part is redundant. The third indication of the data is sent to the primary transmitting end; if the data indicated by the second indication is less than the data indicated by the first indication, the secondary transmitting end waits to receive the next BA.

(5) If the primary transmitting end receives the third indication from the secondary transmitting end, the primary transmitting end clears the data corresponding to the third indication buffered by the primary transmitting end according to the third indication, and waits for receiving the next BA.

Optionally, the secondary transmitting end may not acquire the first BA sent by each receiving end, but only clear the data corresponding to the first indication cached by the secondary transmitting end according to the first indication sent by the primary sending end.

In the multi-access point communication method provided by the embodiment of the present invention, S 302 to S 306 may be repeatedly executed until each receiving end included in the preset sequence receives at least one BAR or a previous system reservation ^; The Network Allocation Vector (NAV) ends. The signal cannot be sent during the time period in which the BAR is sent to each receiving end and the BA transmitted by each receiving end is received, and the content of the competing channel can be restarted until the reserved time NAV ends. Use right.

S 307. After the main transmitting end sends the BAR corresponding to the data to each receiving end, if the BA corresponding to the BAR is not received after the preset time, the primary transmitting end resends the BAR to the receiving end that does not return to the BA.

If the primary transmitting end does not receive the BA sent by each receiving end after the preset time after the end of the BAR is sent by the primary transmitting end, the primary transmitting end resends the BAR to the receiving end that has not returned to the BA.

It should be noted that the preset time may be a Point Coordination Function Inter-frame Space (PIFS), and the PIFS is greater than SIFS. The PIFS provided by the embodiment of the present invention may be defined as a SIFS+ slot time (slot t i me ).

Optionally, the foregoing data indication may be carried in the BAR, or may be carried in other messages, and the invention is not limited.

Further, the preset time is similar to the first preset time, and is also started after the BAR is sent by the sending end. The preset time in the above S 307 is calculated after the BAR is sent from the primary transmitting end.

An embodiment of the present invention provides a communication method for multiple access points. After the primary transmitting end and the secondary transmitting end respectively send data corresponding to each receiving end to each receiving end through a shared channel, the primary transmitting end separately sends the same The data corresponds to the BAR to each receiving end, and the primary transmitting end and the secondary transmitting end acquire the BA corresponding to the BAR sent by each receiving end through the shared channel, and if the BA indicates that the data is correctly received by each receiving end, the primary transmitting end And the secondary transmitting end clears the buffered data respectively. If the BA indicates that the data is not correctly received by each receiving end, the primary transmitting end and the secondary transmitting end initiate retransmission of the data that is not correctly received, and respectively clear the data. The cached data is received correctly. According to the solution, when a plurality of transmitting ends and a plurality of receiving ends jointly transmit data, the plurality of transmitting ends can learn the receiving data of each receiving end according to the BA returned by each receiving end. In the case of the BA, the retransmitted data may be re-transmitted according to the indication of the BA, and the correctly received data of the respective caches may be cleared, thereby performing error recovery on the data received by each receiving end, that is, retransmission is initiated. In turn, the reliability of data transmission is ensured, and the throughput of the system is improved.

An embodiment of the present invention provides another communication method for multiple access points. As shown in FIG. 6, the present invention is applied to a wireless communication system for acquiring a channel based on a contention method, where the communication system includes a primary transmitting end and a shared transmitting channel of the primary transmitting end. At least one secondary transmitting end, at least one first receiving end associated with the primary transmitting end, and at least one second receiving end associated with the secondary transmitting end, the method may include:

S 4 01, the primary transmitting end respectively sends first data corresponding to each first receiving end to each first receiving end, and the secondary transmitting end respectively sends second data corresponding to each second receiving end to each second receiving end .

In the multi-user M IM0 system, as the overall throughput demand of the network increases sharply, the network interference problem has become a key factor hindering the further improvement of network capacity. Eliminating the interference problem of the network from the perspective of multiple senders, and even increasing the overall throughput of the network by using the interference problem of the network has become a development trend, such as cooperative transmission, coordinated beam shaping/interference alignment.

The above-mentioned coordinated beamforming means that after a plurality of transmitting ends of the multi-user MI M0 system share part or all of the channel information, a reasonable transmission scheme is calculated according to the characteristics of the respective transmitting ends, so that the plurality of transmitting ends simultaneously transmit data. To multiple receivers, and without interference or mutual interference, can be ignored to some extent. The interference alignment is that after the data is simultaneously transmitted by multiple transmitting ends, the signals arriving at the respective receiving ends are in orthogonal dimensions, so that the receiving ends effectively separate the useful signals.

In a wireless communication system in which a plurality of transmitting ends transmit data by using a coordinated beamforming/interference alignment method, first, a primary transmitting end is preset in a plurality of transmitting ends, and then a plurality of transmitting ends are started from the primary transmitting end. Get the sending of each receiving end in turn The data is received, so that when the receiving end does not correctly receive the data, the corresponding transmitting end can retransmit the data that is not correctly received to the corresponding receiving end, thereby ensuring the reliability of the data transmission.

In the method for coordinating beamforming/interference alignment used in the embodiment of the present invention, after the first transmitting end shares part or all of the channel information with the primary transmitting end, the primary transmitting end respectively sends the first data corresponding to each first receiving end. At the same time as each of the first receiving ends associated with the primary transmitting end, the secondary transmitting end also transmits the second data corresponding to each of the second receiving ends to the respective second receiving ends associated with the secondary transmitting end.

If there is only one receiving end, the above data is single user data; if there are two or more receiving ends, the above data is multi-user data, and the multi-user data includes mutually independent data for multiple receiving ends, Each sender buffers the multi-user data in a shared manner and simultaneously transmits the data to each receiver simultaneously through spatial multiplexing.

It can be understood that the first data is data corresponding to each of the first receiving ends, and the second data is data corresponding to each of the second receiving ends, respectively.

S 4 02. Each first receiving end generates a corresponding first BA according to the receiving condition of the first data.

After the first receiving end receives the first data, each first receiving end generates a corresponding first BA according to the receiving condition of the first data.

It should be noted that the first BA may be used to indicate that the first receiving end receives the first data, that is, the receiving success or the receiving failure, so that the primary transmitting end can learn, according to the first BA, the first receiving end to the primary transmitting end. First number sent to each first receiving end According to the reception situation.

S403. The primary transmitting end sends a first BAR corresponding to the first data to each first receiving end, where the first BAR carries a preset sequence indication.

The primary transmitting end respectively sends the first data corresponding to each first receiving end to each first receiving end, and the secondary transmitting end respectively sends the second data corresponding to each second receiving end to each second receiving end, and then the primary sending end The first port first sends a first BAR corresponding to the first data to each of the first receiving ends, where the first BAR carries a preset sequence indication, where the sequence indication is used to instruct the secondary transmitting end to send the second corresponding to the second data. The order of the BARs, that is, the secondary transmitting ends sequentially send the second BARs to the second receiving ends associated with them according to the sequence indication, and the second BAR also carries a sequence indication to indicate that the second BAR has not been sent. The terminal sequentially transmits the second BAR in order.

It can be understood that the primary transmitting end may separately send the first BAR to each first receiving end after separately transmitting the first data to each first receiving end, that is, sending the first BAR in an explicit manner; When the first data is sent to the first receiving end, the first BAR is carried, that is, the first BAR is sent in an implicit manner, which is not limited in the present invention.

It should be noted that the first BAR is a request message for confirming the reception status of the first data sent by the first receiving end to the primary transmitting end; the second BAR is used to confirm that each second receiving end sends the secondary sending end to the secondary transmitting end. The request message of the second data reception condition.

Further, if the secondary transmitting end is more than two, the preset sequence indication provided by the embodiment of the present invention may be sent first, and the primary transmitting end does not belong to the same BSS. Sent after the sender. Specifically, in the case of multiple secondary transmitting ends, the sequence of sending the second BAR by each secondary transmitting end may be that the secondary transmitting end that belongs to the same BSS as the primary transmitting end first sends the second BAR to the second receiving end associated with it, and The primary transmitting end does not belong to the secondary transmitting end of the same BSS, and then sends the second BAR to the second receiving end associated therewith.

For example, in the schematic diagram of the first BA or the second BA, as shown in FIG. 7, the sequence indication may include an identifier of the primary sender and an identifier of the secondary sender, where the sequence of the BAR is sent by each secondary sender, where The identity of the primary sender may include the Media Access Control (MAC) address of the primary sender or the primary sender. Associated IDentity (AID), the identifier of the secondary sender may include the MAC address of each secondary sender or the AID of each secondary sender.

Further, the first BA or the second BA may further include B A control, BA information, forward error correcting, and the like. The position of the transmitting end in the sequence indication in the first BA or the second BA may be interchanged with the position of the BA information in the first BA or the second BA. In addition, in order to effectively indicate the presence of the sequence indication in the first BA or the second BA, it is necessary to add a representation bit in the MAC address or BA control to indicate that there is a sequence indication in the first BA or the second BA.

If the first receiving end includes two or more, the sequence indication may further include an identifier of each first receiving end, used to indicate an order in which each first receiving end separately sends the first BA; and if the second receiving end includes two, the sequential indication Further, the identifier of each of the second receiving ends may be included, where the identifier of each of the second receiving ends is respectively sent, where the identifier of each first receiving end may include the MAC address of each first receiving end or the AID of each first receiving end. The identifier of each second receiving end may include a MAC address of each second receiving end or an AID of each second receiving end.

As shown in Figure 8, it is a schematic diagram of the sequence of each sender and the sequence of each receiver in the sequence indication.

As shown in FIG. 9, the schematic diagram of the first BAR or the second BAR is similar to the structure of the first BA or the second BA. Specifically, the position indication in the first BAR or the second BAR is similar to the position indication in the first BA or the second BA, and will not be described in detail herein.

The present invention does not limit the execution order of S402 and S403. That is, the present invention may execute S403 after executing S402 first, or execute S402 after executing S403 first, or perform S402 and S403 at the same time.

S404: Each first receiving end sends a first BA corresponding to the first BAR to the primary sending end, where the first BA carries a sequence indication.

After each first receiving end generates the first BA, and receives the first BAR that requests the autonomous transmitting end to request the first BA, each first receiving end respectively sends the first BA corresponding to the first BAR to the primary transmitting end. It should be noted that after the first sending end sends the first BAR, the primary transmitting end starts receiving the first BA after the first preset time. The first preset time may be SIFS. The SIFS provided by the embodiment of the present invention may be defined as a receiving end receiving time + a receiving/transmitting conversion time + a symbol sending time.

A person skilled in the art can understand that in the method of coordinating beamforming/interference alignment, after multiple senders compete to obtain the right to use the channel, multiple senders use the same channel to send their respective data to multiple transmissions. The terminal is associated with the receiving end, and the plurality of transmitting ends can obtain the BAs sent by the respective receiving ends through the shared channel. That is, the primary transmitting end and the secondary transmitting end can simultaneously send data for each receiving end to each receiving end respectively associated with the receiving end, and the primary transmitting end and the secondary transmitting end can also simultaneously acquire the BA sent by a certain receiving end.

S4 05. If the first BA indicates that the first data is correctly received by each first receiving end, the primary transmitting end clears the first data buffered by the primary transmitting end; or, if the first BA indicates that the first data is not the first one, The receiving end receives the correct data, and the primary transmitting end initiates a retransmission of the first data that is not correctly received, and clears the first data that is correctly received and buffered by the primary transmitting end.

After receiving the first BA, the primary transmitting end can learn, according to the first BA, the receiving status of the first data by each first receiving end, that is, each first receiving end successfully receives the first data or fails to receive. If the first BA indicates that the first data is correctly received by each of the first receiving ends, the primary transmitting end clears the first data buffered by the primary transmitting end; conversely, if the first BA indicates that the first data is not correctly determined by each of the first receiving ends Receiving, the primary transmitting end respectively initiates retransmission of the first data that is not correctly received by each receiving end, and the primary transmitting end clears the first data correctly received by each receiving end, so as to ensure the reliability of the first data transmission.

The first data is not correctly received by the first receiving end, and the first receiving end does not correctly receive the first data sent by the primary transmitting end; or, the first receiving end correctly receives the sending by the primary transmitting end. The first data of the first receiving end does not correctly receive the first data sent by the primary transmitting end. Specifically, the first receiving end does not correctly receive the first data may include: the first receiving end does not correctly receive the pair All of the first data should be received, or the first receiving end does not correctly receive the corresponding partial first data.

In the embodiment of the present invention, the primary transmitting end initiates retransmission of the first data that is not correctly received by each first receiving end, that is, error recovery of the first data to ensure the reliability of the first data transmission.

S406. The secondary transmitting end acquires the first BA sent by each first receiving end through the shared channel, and according to the first BA acquiring sequence indication.

Since the primary transmitting end and the secondary transmitting end share the channel, when each first receiving end sends the first BA to the primary transmitting end corresponding to the first BAR, the secondary transmitting end may also acquire the primary transmitting end to send through the shared channel. The first BA, and may obtain an order indication according to the first BA.

S407. The secondary transmitting end respectively sends the second BAR corresponding to the second data to each second receiving end according to the sequence indication, where the second BAR carries the sequence indication.

After the secondary transmitting end obtains the sequence indication carried in the first BA, the secondary transmitting end may sequentially send the second BAR corresponding to the second data to each second receiving end according to the sequence indication, where the second BAR carries the sequence Instructions.

S408. Each second receiving end generates a corresponding second BA according to the receiving condition of the second data.

After the second receiving end receives the second data, each second receiving end generates a corresponding second BA according to the receiving condition of the second data.

The present invention does not limit the execution order of S407 and S408. That is, the present invention may execute S408 after executing S407 first, or execute S407 after executing S408 first, or perform S407 and S408 simultaneously.

S409. Each second receiving end sends a second BA corresponding to the second BAR to the secondary sending end, where the second BA carries a sequence indication.

After each second receiving end generates the second BA, if receiving the second BAR of the second BA from the secondary transmitting end, each second receiving end separately sends the second BA corresponding to the second BAR to the secondary transmitting end. The second BA carries a sequence indication, and can be used to indicate that the secondary sender that does not send the second BAR sends the second BAR to each associated with the second BAR. Two receiving ends.

It should be noted that after the second sending end sends the second BAR, the second BA starts to be received after the first preset time.

Further, the first preset time provided by the embodiment of the present invention starts after the BAR is sent from the sending end. That is, the first preset time, for the primary transmitting end, the first preset time is calculated after the first transmitting terminal sends the first BAR, and for the secondary transmitting end, the first preset time is The calculation starts after the second BAR is sent from the secondary sender.

As shown in FIG. 10, a schematic diagram of error recovery when coordinating beamforming/interference alignment transmission is performed for multiple transmitting ends, and multiple transmitting ends simultaneously transmit data for each receiving end to corresponding corresponding receiving ends, and then The primary transmitting end first sends the BARs for the respective first receiving ends associated with them to the corresponding first receiving ends, so that each of the first receiving ends respectively returns a first BA to the primary transmitting end indicating the data receiving situation thereof, Then, each of the secondary transmitting ends sequentially transmits the second BARs corresponding to the respective second receiving ends associated with the respective second receiving ends according to the preset order, so that the second receiving ends respectively return to indicate the data receiving thereof. The second BA of the situation to the corresponding secondary sender.

S 4 1 0. If the second BA indicates that the second data is correctly received by each second receiving end, the secondary transmitting end clears the second data buffered by the secondary transmitting end; or, if the second BA indicates that the second data is not the first The second receiving end correctly receives the second data, and the secondary transmitting end separately retransmits the second data that is not correctly received, and clears the correctly received second data buffered by the secondary transmitting end.

After receiving the second BA, the secondary transmitting end learns, according to the second BA, the receiving status of the second data by each second receiving end, that is, each second receiving end succeeds in receiving the second data or fails to receive. If the second BA indicates that the second data is correctly received by each second receiving end, the secondary transmitting end clears the second data buffered by the secondary transmitting end; conversely, if the second BA indicates that the second data is not correctly determined by each second receiving end Receiving, the secondary transmitting end initiates retransmission of the second data that is not correctly received by each second receiving end, and clears the second data that is correctly received by each second receiving end buffered by the secondary transmitting end, thereby ensuring the second data. The reliability of the transmission.

The second data is not correctly received by the second receiving end, and the second receiving end does not correctly receive the second data sent by the secondary transmitting end; or, the second receiving end receives the secondary sending end correctly. The second data is not correctly received by the second receiving end. In particular, if the second receiving end does not correctly receive the second data, the second receiving end does not correctly receive all the second data corresponding thereto, or the second receiving end does not correctly receive the second data corresponding thereto. .

In the embodiment of the present invention, the secondary transmitting end initiates retransmission of the second data that is not correctly received by each of the second receiving ends, that is, error recovery of the second data to ensure the reliability of the second data transmission.

It should be noted that, in another communication method for multiple access points provided by the embodiment of the present invention, first, the primary transmitting end sends the first BAR to each of the first receiving ends, to request each first receiving end to access the first data. Receiving, after each first receiving end returns to the first BA, the secondary transmitting end may sequentially send the second BAR to each second receiving end according to the sequence indication in the first BA, to request each second receiving end to The reception of the two data until all the senders have requested at least one of their associated receivers.

S411. After the primary transmitting end sends the first BAR to each first receiving end, after the preset time, the primary transmitting end does not receive the first BA corresponding to the first BAR, and the primary transmitting end resends the first BAR. Until the first receiver of the first BA is not returned.

If the primary transmitting end does not receive the first BA corresponding to each first BAR after the preset time after the first transmitting end is sent, the primary transmitting end resends the first BAR to the first BA. The first receiving end.

It should be noted that the preset time is PIFS, and PIFS is greater than SIFS. The PIFS provided by the embodiment of the present invention may be defined as SIFS + slot time.

Optionally, after the primary transmitting end receives the first BA sent by each first receiving end, if the first BA indicates that the first data is not correctly received by each first receiving end, the primary sending end sends the first data indication to Each first receiving end of the first data is not correctly received, and the first data indication is used to indicate the first number that is not correctly received by each of the first receiving ends According to.

Optionally, the first data indication may be carried in the first BAR, or may be carried in other messages, and the invention does not limit the invention.

Further, the preset time is similar to the first preset time, and is also started after the BAR is sent by the sending end. The preset time in the above S 4 1 1 is calculated after the first BAR is transmitted from the primary transmitting end.

S 4 1 2. After the secondary transmitting end sends the second BAR to each second receiving end respectively, after the preset time, the secondary transmitting end does not receive the second BA corresponding to the second BAR, and the secondary transmitting end resends The second BAR does not return to the second receiving end of the second BA.

If the secondary sending end does not receive the second BA corresponding to each second BAR after the secondary sending end sends the second BAR, the secondary sending end resends the second BAR to the second BA. Second receiving end.

Optionally, after the second sending end receives the second BA sent by each second receiving end, if the second BA indicates that the second data is not correctly received by each second receiving end, the secondary sending end sends the second data indication to The respective second receiving ends of the second data are not correctly received, and the second data indication is usable for indicating the second data that is not correctly received by the respective second receiving ends.

Optionally, the second data indication may be carried in the second BAR, or may be carried in other messages, and the invention does not limit the invention.

It should be noted that, when the second receiving end sends the second BA, the primary transmitting end can also obtain the second BA sent by each second receiving end, but is carried by the second BA and the second BA. The sequence indication is only used to indicate that the other secondary senders that do not send the BAR perform the corresponding steps. Therefore, the process of receiving the second BA by the primary sender is not described in detail in the embodiment of the present invention.

An embodiment of the present invention provides another method for communicating multiple access points, where the primary transmitting end respectively sends first data corresponding to each first receiving end to each first receiving end, and simultaneously After the secondary transmitting end respectively sends the second data corresponding to each second receiving end to each second receiving end, the primary transmitting end respectively sends the first B AR corresponding to the first data to each first receiving end, and receives a first BA sent by each first receiving end, and if the first BA indicates that the first data is correctly received by each first receiving end, the primary transmitting end clears the first data buffered by the primary transmitting end, or if the first BA indicates The first data is not correctly received by each first receiving end, and the primary transmitting end initiates retransmission of the first data that is not correctly received and clears the correctly received first data buffered by the primary transmitting end, and the secondary transmitting end acquires After the first receiving end transmits the first BA through the shared channel, the secondary transmitting end respectively sends the second B AR corresponding to the second data to each second receiving end according to the sequence indication carried in the first BA, and receives each The second receiving end sends a second BA corresponding to the second BAR, and if the second BA indicates that the second data is correctly received by each second receiving end, the secondary transmitting end clears the secondary sending end The second data, or if the second BA indicates that the second data is not correctly received by each second receiving end, the secondary transmitting end respectively initiates retransmission of the second data that is not correctly received and clears that the secondary transmitting end buffer is correctly The second data received. With this scheme, when data is transmitted jointly between multiple transmitting ends and multiple receiving ends, multiple transmitting ends can learn the data received by each receiving end according to the BAs returned by the respective receiving ends associated with them, and can be based on The indication of the BA initiates retransmission of the data that is not correctly received, and clears the correctly received data of the respective buffers, thereby performing error recovery on the data received by each receiving end, that is, initiating retransmission, thereby ensuring reliable data transmission. Sexuality, improve system throughput.

Embodiment 3

As shown in FIG. 11 , an embodiment of the present invention provides a transmitting apparatus 1 , which is applied to a wireless communication system that acquires a channel based on a contention method, where the communication system includes a primary transmitting end, and at least a shared channel of the primary transmitting end. A transmitting device 1 and a receiving end corresponding to a multi-access point communication method provided by the embodiment of the present invention, the sending device 1 may include:

a sending unit 10, configured to send data to the receiving end simultaneously with the primary transmitting end by using the shared channel, and when the data is not correctly received by each receiving end, pass the shared channel and the primary The sender simultaneously retransmits the number that was not correctly received According to.

The storage unit 11 is configured to cache the data.

The obtaining unit 12 is configured to acquire, by each of the receiving ends, a BA that is sent by using the shared channel.

The clearing unit 13 is configured to: if the BA indicates that the data is correctly received by the respective receiving ends, clear the data buffered by the storage unit 11, or if the BA indicates that the data is not When the respective receiving ends receive correctly, the data that is correctly received by the storage unit 11 is cleared.

Optionally, as shown in FIG. 12, the sending apparatus 1 further includes a receiving unit 14; the receiving unit 14 is configured to: in the clearing unit 13, clear the correctly received data buffered by the storage unit 11 The first indication sent by the primary transmitting end is received, and the first indication is used to indicate the data that is received by the respective receiving ends that are obtained by the primary transmitting end.

Optionally, the acquiring unit 12 is further configured to acquire, according to the BA, a second indication, where the second indication is used to indicate that the data received by the sending device is correctly received by the receiving device, and The clearing unit 13 is specifically configured to determine a union of the data indicated by the first indication and the data indicated by the second indication, and clear the storage unit 缓存 cache according to a result of obtaining a union The data corresponding to the result.

An embodiment of the present invention provides a transmitting apparatus, after the sending apparatus sends data corresponding to each receiving end to each receiving end, the sending apparatus acquires a BA that each receiving end sends through a shared channel, and if the BA indicates that the data is The receiving device correctly receives the data, the transmitting device clears the data buffered by the transmitting device, or if the BA indicates that the data is not correctly received by each receiving end, the transmitting device initiates retransmission and clears the data that is not correctly received. The transmitting device buffers the correctly received data. According to the solution, when the data is transmitted between the plurality of transmitting ends and the plurality of receiving ends, the transmitting device can learn the data received by each receiving end according to the BA returned by each receiving end, and can be not according to the indication of the BA. The correctly received data initiates a retransmission, and clears the correctly received data buffered by the transmitting device, thereby receiving the number of failures for each receiving end. According to the error recovery, the retransmission is initiated, thereby ensuring the reliability of data transmission and improving the throughput of the system.

As shown in FIG. 13, an embodiment of the present invention provides a transmitting apparatus 2, which is applied to a wireless communication system that acquires a channel based on a contention method, where the communication system includes at least one of a primary transmitting end and a shared channel of the primary transmitting end. The transmitting device 2, the at least one first receiving end associated with the primary transmitting end, and the at least one second receiving end associated with the transmitting device 2, corresponding to another embodiment provided by the embodiment of the present invention The communication method of the multiple access points, the sending device 2 may include:

The sending unit 20 is configured to send, by using the shared channel, the second data corresponding to each second receiving end to the respective second receiving ends in synchronization with the primary transmitting end.

The obtaining unit 21 is configured to obtain a first BA that is sent by each of the first receiving ends by using the shared channel, and obtain a preset sequence indication according to the first BA, where the first BA carries the sequence indication, The sequence indicates an order for instructing the sending device 2 to send a second BAR corresponding to the second data sent by the sending unit 20, where the second BAR carries the sequence indication.

The sending unit 20 is further configured to separately send the second BAR to each of the second receiving ends according to the sequence indication acquired by the acquiring unit 21, and not correctly receiving the second receiving end When the second data is described, the second data that is not correctly received is retransmitted separately.

The storage unit 22 is configured to cache the second data.

The receiving unit 23 is configured to receive, after the sending unit 20 sends the second BAR, a second BA that is sent by each of the second receiving ends, where the second BA carries the sequence indication.

The clearing unit 24 is configured to: if the second BA received by the receiving unit 23 indicates that the second data is correctly received by the second receiving ends, clear the second data buffered by the storage unit 22 Or if the second BA indicates that the second data is not correctly received by the respective second receiving ends, clearing the second data that is correctly received by the storage unit 22 is cleared.

Optionally, the sending unit 20 is further configured to be in the sending unit 20 respectively After the second BAR corresponding to the second data is sent to the respective second receiving ends, if the preset time is not received, the receiving unit 2 3 does not receive the second BAR corresponding to the second BAR The second BA resends the second BAR to a second receiving end that does not return to the second BA.

Optionally, the sending unit 20 is further configured to: after the receiving unit 2 3 receives the second BA sent by each of the second receiving ends, if the second BA indicates the If the two data are not correctly received by the respective second receiving ends, the second data indication is sent to the respective second receiving ends that do not correctly receive the second data, and the second data indication is used to indicate that the second data is not used. The second data correctly received by each of the second receiving ends.

The embodiment of the present invention provides a sending device, after the sending device synchronously transmits the second data corresponding to each second receiving end to each second receiving end, the sending device obtains the sharing of each first receiving end respectively. The first BA sent by the channel, and the sending device sends the second BAR corresponding to the second data to each second receiving end according to the sequence indication carried in the first BA, and receives the second and second receiving ends respectively sent by the second receiving end a second BA corresponding to the second BAR, and if the second BA indicates that the second data is correctly received by each second receiving end, clearing the second data buffered by the sending device, if the second BA indicates that the second data is not the second second When the receiving end receives correctly, the second data that is not correctly received is retransmitted, and the second data that is correctly received by the sending device is cleared. According to the solution, when the data is transmitted between the plurality of transmitting ends and the plurality of receiving ends, the transmitting device can learn the data received by each receiving end according to the BA returned by each receiving end, and can The correctly received data initiates retransmission and clears the correctly received data buffered by the transmitting device, thereby performing error recovery on the data received by each receiving end, thereby ensuring the reliability of data transmission and improving the throughput of the system.

Embodiment 4

As shown in FIG. 14 , an embodiment of the present invention provides a beamforming device 1 , which is applied to a wireless communication system for acquiring a channel based on a contention method, where the communication system includes a primary transmitting end and a shared channel of the primary transmitting end. At least one of the beamformers 1, and at least one a receiving end, corresponding to a multi-access point communication method provided by an embodiment of the present invention, the beamformer 1 may include a transmitter 15, a receiver 16, a processor 17, and a memory 18, where

Transmitter 15 can be used to transmit data to other communication devices. In particular, transmitter 15 can transmit communication data to other communication devices if the beamformer is in communication with other communication devices.

The receiver 16 can be used to receive data from other communication devices. In particular, if the beam shaper is in communication with other communication devices, the receiver 16 can receive communication data from other communication devices.

The processor 17 is a beamformer control and processing center that controls the beamformer to transmit and receive signals and implements a beamformer by running a software program stored in the memory 18 and invoking and processing the data stored in the memory 18. Other features.

The memory 18 can be used to store software programs and data such that the processor 17 can implement the beamformer's transceiving signals and other functions by running software programs stored in the memory 18.

The beamformer provided by the embodiment of the present invention may include a communication device in a wireless local area network such as a wireless router or a wireless user equipment.

Specifically, the transmitter 15 is configured to send data to the receiving end simultaneously with the primary transmitting end by using the shared channel, and when the data is not correctly received by each receiving end, The primary transmitting end retransmits the data that is not correctly received at the same time; the receiver 16 is configured to acquire the BAs that are sent by the respective receiving ends respectively through the shared channel; the processor 17 may be used to The BA indicates that the data is correctly received by the respective receiving ends, and the data buffered by the memory 18 is cleared, or if the BA indicates that the data is not correctly received by the respective receiving ends, The memory 18 is buffered by the correctly received data; the memory 18 is operable to store software code of the data and a software program for controlling the beamformer to perform the above steps, such that the processor 17 can execute the software The program and the above software code are called to complete the above steps. Optionally, the receiver 16 is further configured to: before the processor 17 clears the correctly received data buffered by the memory 18, receive a first indication sent by the primary sending end, where the An indication is used to indicate that the data received by the respective receiving ends acquired by the primary transmitting end is correctly received.

Optionally, the processor 17 is further configured to obtain, according to the BA, a second indication, where the second indication is used to indicate the data that is received by the each receiving end that is obtained by the beamformer, and The processor 17 is specifically configured to determine a union of the data indicated by the first indication and the data indicated by the second indication, and clear the memory 18 cache according to a result of obtaining a union. The data corresponding to the result.

An embodiment of the present invention provides a beamformer, after the beamformer transmits data corresponding to each receiving end to each receiving end, the beamformer acquires a BA sent by each receiving end through a shared channel, and if the BA indicates The data is correctly received by each receiver, the beamformer clears the data buffered by the beamformer, or if the BA indicates that the data is not correctly received by each receiver, the beamformer is not correctly received. The data initiates a retransmission and clears the correctly received data of the beamformer buffer. With the solution, when the data is transmitted between the multiple transmitting ends and the multiple receiving ends, the beamformer can learn the data received by each receiving end according to the BA returned by each receiving end, and can be not according to the indication of the BA. The correctly received data initiates retransmission, and clears the correctly received data of the beamformer buffer, thereby performing error recovery on the data received by each receiving end, that is, initiating retransmission, thereby ensuring reliability of data transmission, and improving system reliability. Throughput.

As shown in FIG. 15, an embodiment of the present invention provides a beamformer 2, which is applied to a wireless communication system that acquires a channel based on a contention method, where the communication system includes a primary transmitting end, and at least a shared channel of the primary transmitting end. One of the beamformers 2, at least one first receiving end associated with the primary transmitting end, and at least one second receiving end associated with the beamformer 2, corresponding to the embodiment of the present invention Another communication method of multiple access points, the beamformer 2 may include a transmitter 25, a receiver 26, a processor 27, and a memory 28, where Transmitter 25 can be used to transmit data to other communication devices. In particular, transmitter 25 can transmit communication data to other communication devices if the beamformer is in communication with other communication devices.

Receiver 26 can be used to receive data from other communication devices. In particular, if the beam shaper is in communication with other communication devices, receiver 26 can receive communication data from other communication devices.

The processor 27 is a beamformer control and processing center that controls the beamformer to transmit and receive signals and implement beamforming by running a software program stored in the memory 28 and invoking and processing the data stored in the memory 28. Other features of the device.

The memory 28 can be used to store software programs and data such that the processor 27 can implement the beamformer's transceiving signals and other functions by running software programs stored in the memory 28.

Specifically, the transmitter 25 is configured to send, by using the shared channel, the second data corresponding to each second receiving end to the second receiving end in synchronization with the primary transmitting end; the receiver 26 is available. And acquiring, by the first receiving end, the first BA that is sent by using the shared channel, where the processor is configured to obtain a preset sequence indication according to the first BA, where the first BA carries the sequence Instructing, the sequence indication is used to instruct the beamformer to send a second BAR corresponding to the second data sent by the transmitter 25, where the second BAR carries the sequence indication; The transmitter 25 may be further configured to separately send the second BAR to each of the second receiving ends according to the sequence indication acquired by the processor 27, and the second receiving end does not correctly receive the first receiving end The second data is retransmitted separately, and the second data is not correctly received. The receiver 26 is further configured to: after the transmitter 25 sends the second BAR, receive the second receiving ends respectively. The second BA sent, The second BA carries the sequence indication; the memory 28 is configured to store the software code of the second data, the software code of the first BA, the software code of the second BAR, the first The software code of the second BA and the software program for controlling the beamformer to complete the above steps, so that the processor 27 completes the above steps by executing the above software program and calling the above software code.

Optionally, the transmitter 25 is further configured to: after the transmitter 25 sends the second BAR corresponding to the second data to each of the second receiving ends, if After the time is set, the receiver 26 does not receive the second BA corresponding to the second BAR, and then resends the second BAR to the second receiving end that does not return to the second BA.

Optionally, the transmitter 25 is further configured to: after the receiver 26 receives the second BA sent by each of the second receiving ends, if the second BA indicates the second The data is not correctly received by the respective second receiving ends, and the second data indication is sent to the respective second receiving ends that do not correctly receive the second data, and the second data indication is used to indicate that the The second data correctly received by each of the second receiving ends.

The embodiment of the present invention provides a beamformer, after the beamformer synchronously transmits the second data corresponding to each second receiving end to each second receiving end, the beamformer acquires each first receiving end. a first BA sent by the shared channel, and the beamformer sends a second BAR corresponding to the second data to each of the second receiving ends according to the sequence indication carried in the first BA, and receives the second receiving end from each of the second receiving ends respectively. Sending a second BA corresponding to the second BAR, and if the second BA indicates that the second data is correctly received by each second receiving end, clearing the second data buffered by the beamformer, if the second BA indicates the second data If not received by each of the second receiving ends, the second data that is not correctly received is retransmitted, and the correctly received second data of the beamformer buffer is cleared. With the scheme, when the data is transmitted between the multiple transmitting ends and the multiple receiving ends, the beamformer can learn the data received by each receiving end according to the BA returned by each receiving end, and according to the indication of the BA, The correctly received data initiates retransmission and clears the correctly received data of the beamformer buffer, thereby performing error recovery on the data received by each receiving end, thereby ensuring the reliability of data transmission and improving the throughput of the system. Embodiment 5

As shown in FIG. 16 , an embodiment of the present invention provides a communication system, which can be applied to a wireless communication scenario for acquiring a channel based on a competitive manner, and the communication system can include a main beamformer 3, at least one beamformer 1, and At least one beam receiver 4 corresponding to a multi-access point communication method provided by an embodiment of the present invention, wherein the main beam former 3 corresponds to a main transmitting end, and at least one beamformer 1 corresponds to at least one time respectively The transmitting end, and the at least one beam receiver 4 respectively correspond to at least one receiving end.

Specifically, the main beamformer is configured to: respectively send data corresponding to each beam receiver to the respective beam receivers; respectively send a BAR corresponding to the data to the respective beam receivers; receive the respective a BA corresponding to the BAR sent by the beam receiver; if the BA indicates that the data is correctly received by the respective beam receivers, clearing the data of the main beamformer buffer, if the BA Indicating that the data is not correctly received by the respective beam receivers, retransmitting the data that was not correctly received, and clearing the correctly received data of the main beamformer buffer.

The beamformer is configured to: simultaneously transmit the data to the respective beam receivers with the main beamformer over the shared channel.

The beam receiver is configured to: receive the data sent by the main beamformer and the beamformer; receive the BA R corresponding to the data sent by the main beamformer; send and The BA corresponding to the B AR to the main beamformer.

Optionally, the beamformer is further configured to: obtain, by the respective beam receiver, the BA that is sent by using the shared channel, respectively, if the BA indicates that the data is correctly received by the respective beam receivers Clearing the data buffered by the beamformer, or if the BA indicates that the data is not correctly received by the respective beam receivers, simultaneously communicating with the main beamformer through the shared channel The data that is correctly received initiates a retransmission, respectively, and clears the data received by the beamformer buffer that was correctly received.

Optionally, the main beamformer respectively sends the corresponding to the data After the BAR is sent to the respective beam receivers, if the BA corresponding to the BAR is not received after a preset time, the BAR is retransmitted to a beam receiver that does not return to the BA.

Optionally, after receiving, by the main beamformer, the BAs sent by the respective beam receivers, the primary beamformer is further configured to send, if the BA indicates that the data is not correctly received by the respective beam receivers. The data indicates to the respective beam receivers that did not correctly receive the data, the data indications being used to indicate the data that was not correctly received by the respective beam receivers.

Optionally, the beam receiver is two or more; the main beamformer is configured to separately send the BAR to the beam receivers according to a preset sequence, where the preset sequence is first The main beamformers are transmitted by the respective beam receivers belonging to the same BS S, and are then transmitted to the respective beam receivers that do not belong to the same BSS.

Optionally, the main beamformer is configured to: obtain a first indication according to the BA, where the first indication is used to indicate that the respective beam receivers acquired by the main beamformer correctly receive the Data; clearing, according to the first indication, the data corresponding to the first indication of the main beamformer buffer.

Optionally, the main beamformer is further configured to send the first indication to the beamformer.

Optionally, the beamformer is further configured to receive the first indication sent by the main beamformer before the BA clears the correctly received data of the beamformer buffer.

Optionally, the beamformer is configured to: obtain a second indication according to the BA, where the second indication is used to indicate the data that is received by the beam receivers correctly received by the beam receivers; And determining, by the data indicated by the first indication and the data indicated by the second indication, a union; clearing, according to a result of obtaining a union, the beamformer buffer corresponding to the result data.

Embodiments of the present invention provide a communication system in which a main beamformer and a beamformer respectively transmit data corresponding to each beam receiver to each by a shared channel. After the beam receiver, the main beamformer respectively transmits a BAR corresponding to the data to each beam receiver, and the main beamformer and the beamformer acquire a BA corresponding to the BAR that each beam receiver transmits through the shared channel respectively. And if the BA indicates that the data is correctly received by each beam receiver, the main beamformer and the beamformer respectively clear the buffered data, and if the BA indicates that the data is not correctly received by each beam receiver, the main beamforming The beamformer and beamformer then retransmit the data that was not correctly received and clear the cached data that was correctly received. With this scheme, when a plurality of beamformers and a plurality of beam receivers jointly transmit data, the plurality of beamformers can learn the data received by each beam receiver according to the BA returned by each beam receiver, and can The indication of the BA initiates retransmission of the data that is not correctly received, and clears the correctly received data of the respective buffers, thereby performing error recovery on the data received by each beam receiver, that is, initiating retransmission, thereby ensuring data transmission. Reliability, increasing system throughput.

As shown in FIG. 17, the embodiment of the present invention further provides another communication system, which is applied to a wireless communication scenario for acquiring a channel based on a contention method, the communication system including a main beamformer 5, at least one beamformer 2, and At least one first beam receiver 6 associated with the main beamformer 5 and at least one second beam receiver 7 associated with the at least one beamformer 2, corresponding to another multi-connection provided by an embodiment of the present invention Incoming point communication method, wherein the main beam former 5 corresponds to the primary transmitting end, the at least one beamformer 2 corresponds to at least one secondary transmitting end, and the at least one first beam receiver 6 respectively corresponds to the at least one first receiving And, at least one second beam receiver 7 corresponds to the at least one second receiving end, respectively.

Specifically, the main beamformer is configured to: respectively send first data corresponding to each first beam receiver to each of the first beam receivers; and respectively send a first BAR corresponding to the first data to the first Each of the first beam receivers; receiving, by the first first beam receivers, a first BA corresponding to the first BAR; and if the first BA indicates that the first data is If the beam receiver receives correctly, the first data buffered by the main beamformer is cleared, or if the first BA indicates that the first data is not correctly received by the first beam receivers, Not The first data that is correctly received initiates retransmission and clears the first data that is correctly received by the primary beamformer buffer, where the first BAR and the first BA carry a preset The sequence indicates that the sequence indicates an order for the beamformer to send a second BAR corresponding to the second data, and the second BAR carries the sequence indication.

The beamformer is configured to: synchronously transmit, by the shared beam channel, the second data corresponding to each second beam receiver to the respective second beam receivers by using the shared beamformer; The first BA that is sent by the one beam receiver through the shared channel, and obtains the sequence indication according to the first BA; and sequentially sends the second BAR to each of the second according to the sequence indication Receiving, by the respective second beam receivers, a second BA corresponding to the second BAR, where the second BA carries the sequence indication; if the second BA indicates the And if the second data is correctly received by the second beam receivers, the second data buffered by the beamformer is cleared, or if the second BA indicates that the second data is not the second beam When the receiver receives correctly, the second data that is not correctly received is separately retransmitted and the second data that is correctly received by the beamformer buffer is cleared.

The first beam receiver is configured to: receive the first data sent by the main beamformer and the first BAR; and send the first BA to the main beam forming corresponding to the first BAR Device.

The second beam receiver is configured to: receive the second data and the second BAR sent by the beamformer; and send the second BA corresponding to the second BAR to the beamformer.

Optionally, after the primary beamformer sends the first BAR corresponding to the first data to each of the first beam receivers, the primary beamformer is further configured to: after the preset time, does not receive the The first BA corresponding to the first BAR retransmits the first BAR to a first beam receiver that does not return to the first BA.

Optionally, after the first beam is sent by the first beam receivers, the primary beamformer is further configured to: if the first BA indicates the first number According to the fact that the respective first beam receivers are not correctly received, the first data indication is sent to the respective first beam receivers that do not correctly receive the first data, and the first data indication is used to indicate that The first data received by each of the first beam receivers correctly.

Optionally, after the beamformer sends the second BAR corresponding to the second data to the respective second beam receivers, the beamformer is further configured to: after the preset time, is not received. The second BA corresponding to the second BAR retransmits the second BAR to a second beam receiver that does not return to the second BA.

Optionally, after the beamformer receives the second BA sent by each of the second beam receivers, and if the second BA indicates that the second data is not the first If the two beam receivers receive correctly, the second data indication is sent to the respective second beam receivers that do not correctly receive the second data, and the second data indication is used to indicate that the second second beam is not received. The second data received correctly by the device.

Optionally, the beamformer is two or more, and the sequence indication is sent first by a beamformer that belongs to the same BSS as the main beamformer, and the main beamformer does not belong to the same BS S beam. Transmitting after the shaper, the sequence indication includes an identifier of the main beamformer and an identifier of the beamformer, wherein the identifier of the main beamformer includes an MA C address or an AID of the main beamformer The identifier of the beamformer includes a MAC address or an AID of each beamformer, respectively.

Optionally, the first beam receiver is more than two, and the second beam receiver is two or more, and the sequence indication further includes an identifier of each of the first beam receivers, configured to indicate the Each of the first beam receivers respectively sends the sequence of the first BA, and the sequence indication further includes an identifier of each of the second beam receivers, configured to instruct the respective second beam receivers to separately send the An order of the second BAs, where the identifiers of the respective first beam receivers respectively include a MAC address or an AID of each of the first beam receivers, and the identifiers of the respective second beam receivers respectively include the second The MAC address or AID of the beam receiver.

An embodiment of the present invention provides another communication system, which is separately sent by a main beamformer. After the first data corresponding to each of the first beam receivers is sent to each of the first beam receivers, and the beamformer respectively transmits the second data corresponding to the respective second beam receivers to the respective second beam receivers, the first The beamformer respectively transmits a first BAR corresponding to the first data to each first beam receiver, and receives a first BA respectively sent by each first beam receiver, and if the first BA indicates that the first data is first The beam receiver receives correctly, the main beamformer clears the first data buffered by the main beamformer, or if the first BA indicates that the first data is not correctly received by each first beam receiver, the main beamformer is not The correctly received first data initiates retransmission and clears the correctly received first data of the main beamformer buffer, and the beamformer obtains the first BA sent by each first beam receiver through the shared channel respectively, and beamforming Transmitting, according to the sequence indication carried in the first BA, the second BAR corresponding to the second data to each of the second beam receivers, and receiving each The second beam receiver respectively sends a second BA corresponding to the second BAR, and if the second BA indicates that the second data is correctly received by each second beam receiver, the beamformer clears the second data of the beamformer buffer Or if the second BA indicates that the second data is not correctly received by the respective second beam receivers, the beamformer respectively initiates retransmission of the second data that is not correctly received and clears the correctly received header of the beamformer buffer. Two data. With this scheme, when a plurality of beamformers and a plurality of beam receivers jointly transmit data, the plurality of beamformers can learn the data received by the respective beam receivers according to the BAs returned by the respective beam receivers associated with them. In the case, according to the indication of the BA, the data that is not correctly received is retransmitted, and the correctly received data that is buffered is cleared, so that the data received by each beam receiver is error-recovered, that is, the retransmission is initiated. In turn, the reliability of data transmission is ensured, and the throughput of the system is improved.

It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above functional assignments may be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again. In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as the units may or may not be physical units, and may be located in one place or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiment of the present embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods of the various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any skilled person skilled in the art may disclose the technology disclosed in the present invention. Variations or substitutions are readily conceivable within the scope of the invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

claims

1. A communication system, characterized in that it includes a primary transmitter, at least one secondary transmitter sharing a channel with the primary transmitter, and at least one receiver, wherein,

The main sending end is used for:

Send data corresponding to each receiving end to each receiving end respectively;

Send a block acknowledgment request BAR corresponding to the data to each receiving end respectively; receive a block acknowledgment BA corresponding to the BAR sent by each receiving end respectively; if the BA indicates that the data is sent by each receiving end, If the receiving end receives it correctly, the data cached by the main sending end will be cleared. If the BA indicates that the data has not been received correctly by each receiving end, retransmission of the data that has not been received correctly will be initiated. And clear the correctly received data cached by the main sending end;

The secondary sending end is used for:

Send the data to each receiving end simultaneously with the main transmitting end through the shared channel;

The receiving end is used for:

Receive the data sent by the primary sending end and the secondary sending end;

Receive the BAR corresponding to the data sent by the main sending end;

Send the BA corresponding to the BAR to the main sending end.

2. The communication system according to claim 1, characterized in that,

The secondary sending end is also used for:

Obtain the BA sent by each receiving end through the shared channel; if the BA indicates that the data is correctly received by each receiving end, clear the data cached by the secondary sending end, or If the BA indicates that the data has not been correctly received by each receiving end, the shared channel and the main transmitting end simultaneously initiate retransmissions of the data that have not been correctly received, and clear the times. The data buffered by the sending end and received correctly.

3. The communication system according to claim 1 or 2, characterized in that, after the main transmitting end sends the BAR corresponding to the data to each receiving end, it is also used to: After that, all the data corresponding to the BAR are not received. BA, then resend the BAR to the receiving end that did not return BA.

4. The communication system according to claim 1 or 2, characterized in that,

After the main sending end receives the BA respectively sent by each receiving end, if the BA indicates that the data has not been correctly received by each receiving end, send a data indication to the data that has not been received correctly. Each receiving end of the data, the data indication is used to indicate the data that has not been correctly received by each receiving end.

5. The communication system according to any one of claims 1 to 4, characterized in that there are more than two receiving ends;

The main sending end is specifically configured to send the BARs to each of the receiving ends according to a preset order. The preset order is to first send the BARs to the respective basic service groups BS S that belong to the same basic service group BS S as the main sending end. The receiving end sends it, and then sends it to each receiving end that does not belong to the same BSS as the main sending end.

6. The communication system according to any one of claims 1 to 5, characterized in that the main sending end is specifically used for:

Obtain a first indication according to the BA, and the first indication is used to instruct the main sending end to obtain the data correctly received by each receiving end;

Clear the data cached by the main sending end and corresponding to the first instruction according to the first instruction.

7. The communication system according to claim 6, characterized in that,

The primary sending end is also configured to send the first indication to the secondary sending end.

8. The communication system according to claim 6 or 7, characterized in that, before the secondary sending end clears the correctly received data cached by the secondary sending end according to the BA, it is also used to receive the The first indication sent by the main sending end.

9. The communication system according to claim 8, characterized in that,

The secondary sending end is specifically used for:

Obtain a second indication according to the BA, and the second indication is used to instruct the secondary sending end to obtain the data correctly received by each receiving end;

Obtain the union of the data indicated by the first indication and the data indicated by the second indication; Clear the data corresponding to the result cached by the secondary sending end according to the result of obtaining the union.

10. A communication system, characterized in that it includes a primary transmitter, at least one secondary transmitter sharing a channel with the primary transmitter, at least one first receiver associated with the primary transmitter, and At least one second receiving end associated with the secondary sending end, where,

The main sending end is used for:

Send first data corresponding to each first receiving end to each first receiving end respectively;

Send a first block acknowledgment request BAR corresponding to the first data to each of the first receiving ends;

Receive the first block confirmation BA corresponding to the first BAR sent by each of the first receiving terminals;

If the first BA indicates that the first data is correctly received by each first receiving end, then clear the first data cached by the main sending end, or if the first BA indicates that the first If the data is not correctly received by each of the first receiving ends, then retransmission is initiated for the first data that is not correctly received and the correctly received first data cached by the main sending end is cleared, where, The first BAR and the first BA carry a preset sequence indication. The sequence indication is used to instruct the secondary sending end to send the sequence of the second BAR corresponding to the second data. The second BAR contains carry said sequence instructions;

The secondary sending end is used for:

Send the second data corresponding to each second receiving end to each second receiving end synchronously with the main transmitting end through the shared channel;

Obtain the first BA sent by each first receiving end through the shared channel, and obtain the sequence indication according to the first BA;

Sending the second BAR to each of the second receiving terminals in turn according to the sequence indication;

Receive the second BA corresponding to the second BAR sent by each of the second receiving ends, and the second BA carries the sequence indication; If the second BA indicates that the second data is correctly received by each second receiving end, then clear the second data cached by the secondary sending end, or if the second BA indicates that the second If the data is not correctly received by each of the second receiving ends, retransmission is initiated for the second data that is not correctly received and the correctly received second data cached by the secondary sending end is cleared;

The first receiving end is used for:

Receive the first data and the first BAR sent by the main sending end;

Send the first BA corresponding to the first BAR to the main sending end; the second receiving end is used for:

Receive the second data and the second BAR sent by the secondary sending end;

Send the second BA corresponding to the second BAR to the secondary sending end.

11. The communication system according to claim 10, characterized in that,

After the main transmitting end respectively sends the first BAR corresponding to the first data to each first receiving end, it is also used if the first BAR corresponding to the first BAR is not received after a preset time. of the first BA, then resend the first BAR to the first receiving end that did not return the first BA.

12. The communication system according to claim 10 or 11, characterized in that the main sending end receives the first first receiving end respectively sent by the first receiving end.

After the BA, if the first BA indicates that the first data has not been correctly received by each of the first receiving ends, send a first data indication to each of the first data that has not correctly received the first data. A receiving end, the first data indication is used to indicate the first data that has not been correctly received by each first receiving end.

13. The communication system according to any one of claims 10 to 12, wherein the secondary sending end sends the second BAR corresponding to the second data to each of the second receiving ends. , and is also used to resend the second BAR to the second receiving end that does not return the second BA if the second BA corresponding to the second BAR is not received after the preset time.

14. The communication system according to any one of claims 10 to 13, characterized in that, the secondary sending end receives the second receiving end respectively sent by the second receiving end. After the BA, if the second BA indicates that the second data has not been correctly received by each of the second receiving terminals, send a second data indication to each of the first data that has not correctly received the second data. Two receiving terminals, the second data indication is used to indicate the second data that has not been correctly received by each of the second receiving terminals.

15. The communication system according to any one of claims 10 to 14, characterized in that there are more than two secondary transmitters, and the order indication is the secondary transmitter belonging to the same basic service group BSS as the primary transmitter. The sending end sends first, and the secondary sending end that does not belong to the same BSS as the primary sending end sends later. The sequence indication includes the identity of the primary sending end and the identity of the secondary sending end, wherein the identity of the primary sending end includes The media access control MAC address or associated serial number AID of the primary sender, and the identifier of the secondary sender respectively includes the MAC address or AID of each secondary sender.

16. The communication system according to any one of claims 10 to 15, characterized in that there are more than two first receiving terminals, and there are more than two second receiving terminals, and the sequence indication further includes: The identification of each first receiving end is used to indicate the order in which each first receiving end sends the first BA, and the sequence indication further includes the identification of each second receiving end, used to indicate the order in which each first receiving end sends the first BA. The second receiving end respectively sends the sequence of the second BA, wherein the identification of each first receiving end respectively includes the MAC address or AID of each first receiving end, and the identification of each second receiving end includes the said The MAC address or AID of each second receiving end.

17. A sending device, applied to a wireless communication system that acquires a channel based on a competition method, characterized in that the communication system includes a main sending end, and at least one sending device that shares a channel with the main sending end, and At least one receiving end, wherein the sending device includes:

A sending unit, configured to send data to each receiving end through the shared channel and the main sending end simultaneously, and when each receiving end does not receive the data correctly, send data to the main sending end through the shared channel. At the same time, retransmit the data that was not received correctly;

A storage unit used to cache the data;

An acquisition unit, configured to acquire the block acknowledgment BA sent by each receiving end through the shared channel; A clearing unit, configured to clear the data cached in the storage unit if the BA indicates that the data is correctly received by each receiving end, or if the BA indicates that the data is not received by each receiving end. If the terminal receives it correctly, the correctly received data cached in the storage unit is cleared.

18. The sending device according to claim 17, characterized in that, the sending device further includes a receiving unit;

The receiving unit is configured to receive the first indication sent by the main sending end before the clearing unit clears the correctly received data cached in the storage unit, and the first indication is used to indicate the The main sending end obtains the data correctly received by each receiving end.

19. The sending device according to claim 18, characterized in that,

The acquisition unit is further configured to acquire a second indication according to the BA, and the second indication is used to instruct the sending device to acquire the data correctly received by each receiving end;

The clearing unit is specifically configured to find a union of the data indicated by the first indication and the data indicated by the second indication, and clear the cached data of the storage unit according to the result of the union. The data corresponding to the results.

20. A sending device, applied to a wireless communication system that acquires channels based on a competition method, characterized in that the communication system includes a main sending end, at least one sending device that shares a channel with the main sending end, At least one first receiving end associated with the main sending end, and at least one second receiving end associated with the sending device, wherein the sending device includes:

A sending unit, configured to send second data corresponding to each second receiving end to each second receiving end synchronously with the main sending end through the shared channel;

An acquisition unit, configured to acquire the first block acknowledgment BA sent by each first receiving end through the shared channel, and acquire a preset sequence indication according to the first BA, where the first BA carries the sequence indication , the sequence indication is used to instruct the sending device to send the sequence of the second block acknowledgment request BAR corresponding to the second data sent by the sending unit, and the second BAR carries the sequence indication; The sending unit is further configured to send the second BAR to each second receiving end according to the sequence indication obtained by the obtaining unit, and the second BAR is not correctly received at each second receiving end. When two data are received, retransmit the second data that was not received correctly;

A storage unit used to cache the second data;

A receiving unit, configured to receive the second BA respectively sent by each second receiving end after the sending unit respectively sends the second BAR, and the second BA carries the sequence indication;

A clearing unit, configured to clear the second data cached in the storage unit if the second BA received by the receiving unit indicates that the second data is correctly received by each second receiving end, or if If the second BA indicates that the second data has not been correctly received by each second receiving end, the correctly received second data cached in the storage unit is cleared.

2 1. The sending device according to claim 20, characterized in that,

The sending unit is also configured to: after the sending unit respectively sends the second BAR corresponding to the second data to each second receiving end, if after the preset time, the receiving If the unit does not receive the second BA corresponding to the second BAR, it resends the second BAR to the second receiving end that does not return the second BA.

22. The sending device according to claim 20, characterized in that,

The sending unit is further configured to: after the receiving unit receives the second BA respectively sent by the respective second receiving ends, if the second BA indicates that the second data has not been If the two receiving ends receive the data correctly, a second data indication is sent to each of the second receiving ends that did not receive the second data correctly. The second data indication is used to indicate that the data was not received correctly by each of the second receiving ends. of the second data.

2 3. A multi-access point communication method, applied to a wireless communication system that acquires channels based on a competition method, characterized in that the communication system includes a main transmitter and at least one of the main transmitter sharing the channel A secondary sending end, and at least one receiving end, wherein the secondary sending end transmits data to each receiving end simultaneously with the primary sending end through the shared channel; The secondary sending end obtains the block acknowledgment BA sent by each receiving end through the shared channel;

If the BA indicates that the data is correctly received by each receiving end, the secondary sending end clears the data buffered by the secondary sending end;

or,

If the BA indicates that the data has not been received correctly by each receiving end, the secondary transmitting end initiates retransmission of the data that has not been received correctly through the shared channel at the same time as the primary transmitting end, and The secondary sending end clears the correctly received data buffered by the secondary sending end.

24. The multi-access point communication method according to claim 23, characterized in that, before the secondary sending end clears the data cached by the secondary sending end, the method further includes:

The secondary sending end receives the first indication sent by the primary sending end, and the first indication is used to instruct the primary sending end to obtain the data correctly received by each receiving end.

25. The multi-access point communication method according to claim 24, wherein the secondary sending end clearing the data cached by the secondary sending end specifically includes:

The secondary sending end obtains a second indication according to the BA, and the second indication is used to instruct the sending device to obtain the data correctly received by each receiving end;

The secondary sending end obtains a union of the data indicated by the first indication and the data indicated by the second indication;

The secondary sending end clears the data corresponding to the result cached by the secondary sending end according to the result of obtaining the union.

26. A multi-access point communication method, applied to a wireless communication system that acquires a channel based on a competition method, characterized in that the communication system includes a main transmitter and at least one secondary server that shares a channel with the main transmitter. The sending end, at least one first receiving end associated with the primary sending end, and at least one second receiving end associated with the secondary sending end, wherein,

The secondary sending end synchronizes with the primary sending end through the shared channel to send second data corresponding to each second receiving end to each second receiving end; The secondary sending end obtains the first block acknowledgment BA sent by each first receiving end through the shared channel, and obtains a preset sequence indication according to the first BA, and the first BA carries the sequence indication. , the sequence indication is used to instruct the secondary sending end to send the sequence of the second block acknowledgment request BAR corresponding to the second data, and the second BAR carries the sequence indication;

The secondary sending end sends the second BAR to each of the second receiving ends in turn according to the sequence instruction;

The secondary sending end receives the second BA corresponding to the second BAR sent by each of the second receiving ends respectively, and the second BA carries the sequence indication;

If the second BA indicates that the second data is correctly received by each second receiving end, the secondary sending end clears the second data buffered by the secondary sending end;

or,

If the second BA indicates that the second data has not been correctly received by each second receiving end, the secondary sending end initiates a retransmission of the second data that has not been received correctly and clears the secondary sending. The second data buffered by the client and received correctly.

27. The multi-access point communication method according to claim 26, wherein after the secondary sending end sends the second BAR to each of the second receiving ends, the method further includes:

If the second BA corresponding to the second BAR is not received after the preset time, the secondary sending end resends the second BAR to the second receiving end that does not return the second BA.

28. The multi-access point communication method according to claim 26, characterized in that, after the secondary sending end receives the second BA respectively sent by the respective second receiving ends, the method further includes: :

If the second BA indicates that the second data is not received correctly by each second receiving end, the secondary sending end sends a second data indication to each second receiving end that does not receive the second data correctly. At the receiving end, the second data indication is used to indicate the second data that has not been correctly received by each second receiving end.